Okay, seriously… You have been at this company for 10 years and to me it sounds like you can’t even do your job without being told what to do. A performance plan doesn’t have to have all the details about how you improve, but it’s pretty clear that you need to suck it up and actually do your job rather than blaming other people for your incompetence in your position. You shouldn’t need someone to baby you when you have been somewhere for years.

Also the one person who was actually helping you got fired because you were upset you couldn’t vent to her anymore. How about showing some loyalty to the people that help you. Next time, maybe don’t befriend the boss and then screw them over. If you want to vent do it with friends or family away from work. If you are struggling with doing your job, maybe you should step down from your current position as from what I’ve read it’s too hard for you.

I feel sorry for your old boss because she got fired, but I also don't feel sorry for her as she no longer has to deal with your whining about how hard your life is.