It hurts when ppl don't even treat you like a human being

So for context, I'm a student at a university and was originally working in lab A before the professor went to a different university for a higher paying job, and everyone else in the lab went with him except for me. I then joined lab B because the professor knows the one from lab A and they are working on a project together, so I still was able to continue doing similar stuff to when I was in lab A. It turns out that the professor in lab B is really old and has a lot of health issues and is retiring soon, and I felt really bad because I'd be his last student, so I went to lab C.

I then left lab C because it was very obvious that no one there liked me. My professors would take forever to give me something to do (and I need data or else I won't be able to graduate and get my degree). They'd get pissed off and mad at me for stupid things or would introduce others at events but not me or would always "forget" to show up to meetings with me and would tell me mean things that didn't even make any sense. Like once, one of them told me that it didn't seem like I knew what I doing even though I literally just received a hard to get scholarship that I wrote based off the research I was doing in the lab AND she barely even spent much time with me because she had been traveling the past several weeks and I was still new-ish to the lab still.

So then I went back to lab B because I was tired of that shit. I sent a message explaining to lab C that I apologize for leaving but that I will do anything they need me to finish up and asked if maybe I can return in the future when I graduated. Got no answer from anyone but moved on

So then when I went to go back to lab B, I was technically also joined back with lab A since the two groups work together on the same project like I mentioned. They're at a different university, but I never got any messages welcoming me back into the group or anything from lab A. So I tried reaching out to them instead to see how they were doing and how I was glad to be working with them again. And NONE of them responded. Absolutely none.

I knew it would happen since I knew they all hated me but I worked with them all (in person) for at least a year before they all left to go to the different university. So it's not like I was a stranger or random person. And also I sent an entire message to one of them because I heard a big exam was coming up for her soon (it's one of the biggest ones you have to take as a PhD student), and I spent time writing an email wishing her luck and told her shes going to do great and asked if I could watch on zoom and didnt hear not one word. It just showed me how little people think of me.

And I know these people see emails because I've seen others send something to them, and they answer within a few hours max. So its definitely that they just hate me in particular