Well you can't come across as awkward or "odd" otherwise you wouldn't be getting all of these jobs in the first place (since you say you keep getting forced out rather than sacked I take it you must have had quite a few).
So why would you be considered to be employable, only for you to then get a load of crap once you're in the job?
Could it be that you suffer from something like imposter syndrome, and you're subconsciously interpreting what people say as being digs at you, and that then sends your relationships with them into a downward spiral?
My ex I am sure suffers from NPD or maybe NPD with a spalsh of BPD. She's had more jobs than most people have had hot dinners, and her experience would always go like this:
1) She gets the job and it's great. It's a fantastic job, the people are all awesome, and the company is great.
2) 4 to 6 months later - the job is awful, the people are all gits, and the company is shit and/or unethical and unfair.
3) 9 months to 12 months - she can't stand going there any more, she feels like she's being picked on, and often would leave and then look for a new job.
What I think was happening:
1) She is the new girl in the office, so everyone goes out of their way to talk to her, show interest in her and make her feel welcome - exactly what someone with NPD needs. Also every time she does her job she gets a pat on the back - because they want to encourage her and reinforce the correct working procedures, but she interprets that as everyone thinking she's awesome.
2) She is now just Jane Doe in the office, not new, no one goes out of their way to make her feel special, and the only time anyone comments on her work is when she's made a mistake - she now interprets this as people not liking her and picking on her.
3) It becomes so unbearable and she hates them all so much for "what they're putting her through" she just leaves.
I'm not saying that is what you're doing, I'm saying that's what she did, and that's how easy it is to misinterpret things depending on how your filters tell your brain the world is working.