Please advise on how to navigate upcoming 1:1 meeting with boss, given circumstances? [closed]

I have documented my difficult work situation in this question and this question

Where things stand is that I am actively looking for a completely different group to be on in the large company I am a part of. This will take me away from the functional manager who empowers bullies by taking no action, and far away from the team I am currently on.

My problem is, as documented in the above questions, my scrum master is 'threatened' because I have more experience than him. Multiple colleagues have made me aware of this. Since I started at the company, it has been nothing but an uphill battle - with the scrum master constantly doing whatever he can to make my work take longer than it has to, making it look like that I am having a performance issue.

A frequent routine is once I completely finish a story on our agile board, resolve all git comments, and the work is now going through the pipeline - I am asked to add additional functionality that is outside of the scope of the story by way of 50+ sudden git comments, in order to make it appear to management that I am unable to complete my work in a timely manner. This will happen again and again, dragging my work out for weeks on end.

The last time this occurred, I stood up for myself and asked 'Is what you are looking for within the scope of the story? I am not sure that it is.' This caused the scrum master to run to my functional manager, and the functional manager said it is perfectly OK for me to ask if requested functionality is in scope, and for a change, I actually got to complete my story in a decent amount of time.

However, this behavior has resurfaced. During my time with this team, when I ask for 'help' from the functional manager he either does nothing OR he goes entirely too far. By going too far, he always ultimately ends up not actually resolving the issue at hand and creating more problems for me at the office and interpersonally with my team. It is too much stress + anxiety to ask for his help at this point.

The scrum master will not let me take stories off the Agile story board. I am the only employee who has to ask him if I can be assigned a new story. It seems that every story he assigns me, has a different type of 'disaster' associated with it, which again drags out my work, which again makes it look like I am having a performance issue when I formerly worked at one of the most well known organizations globally, as a lead developer on a large software product that I almost entirely conceptualized.

That being said - my latest issue is, I have been working on a single story for about six weeks. It is a program that is too big to run on our standard kubernetes set up, and requires the scaling up of numerous pods (with more memory resources) to get the program to run. After last week, for some unknown reason - our systems cannot handle running this program at all. I've been trying everything, and it's not a code error - it is just too big and with too many assets for our current environment setup. That's not my fault.

However, another component of why this story has taken so long, is that the entity I am doing this work for wants to make sure certain things are done to the 'letter.' The scrum master, doesn't 'agree' with what the entity wants, but in this case they are the 'customer' - we have to make sure we meet their requirements. Last week, the scrum master left a comment on the merge request 'I don't understand the issues, all you were asked to do was update X program.'

I communicate with him about the issues daily at the scrum meetings, no help or support is provided, and I also leave notes in the description on all tasks in the Agile board associated with my story so everyone knows what is going on. I make sure to put 'see details' next to the title of each task so it is highly visible. I can tell you, that there is no way - humanly possible, he has no understanding of what's going on. I have no doubt this is again another attempt to make it look like there is a performance problem.

I have a 1:1 meeting with my boss tomorrow. The last 1:1 meeting I had, I said I was working on this story and I was finishing it. That honestly was what was happening 4 weeks ago. I am mortified that I am going to go in there, and say that I am still working on the same story, when there's already a performance concern, and I am worried about how it is going to negatively impact my situation at the office.

I have no idea how to handle this situation. I almost want to find a way to evade this meeting until this story is successfully completed/merged, so I can say I'm working on a new story, with no mention of the current/old story.

Can someone help me out here? Do I go to the meeting? Do I try to reschedule it? What do I say?

The problem is, there's no point in trying to have the issues with the scrum master addressed - this functional manager backs up the scrum master to the hilt - that is why this situation has dragged out for so long.

I can tell you how I honestly feel is like this: "Hey Boss, I recognize the team is a poor fit, so I am working hard to network across the company to find a different group/team to join, as quickly as possible." I wonder if having the conversation from that route would make the 'performance issues' less serious - because it is clear that there is an end in sight w/regards to me being on the team, and also I am acknowledging that I recognize that things are 'not working' ?

I am completely mortified by how I have gone from being a well known high performer in all of my previous roles, to becoming someone there is clearly performance concerns about - due to the actions of others. I have been urged by numerous people at the office to go to HR (there are other incidents - workplace bullying etc that others in the office have observed), but I read on an employee message board how going to HR for a situation like this totally backfired and had negative career consequences for another employee, so it makes more sense to move on.

I am doing everything I can to network across the company, and leave this team as quickly as possible. Any help you could provide regarding the 1:1 meeting would be greatly appreciated.