The fact that you don't feel like putting your real name on your throw-away account says a lot. You clearly don't feel safe and that's bad. If you can't feel safe at work, start cutting your new reel and interview at places with a more trust-based and honest culture.
There's a really great GDC talk from the bootcamp this year called "How to go from Good to Great" by Christina Wun of Riot games. She gave a great talk about building a feedback-positive workplace culture based on trust. IMHO it's one of the best and most important GDC talks I've seen for any VFX artist. Having a team you can trust and be frank with is super important.
I think a lot of the time we focus and double down on strictly the technical and artistic pillars of VFX creation, and sometimes we ignore our workplace relationships because of that. Just as important is the trust you have between your teammates and your ability to give and take honest critique. It's the only way you'll improve your artistic and technical skills. It's fundamental to feel safe at work giving and taking critique, and if you can't get that from work (or if things are getting political), it might be time to find a new job. If you feel like they're working on getting you fired, you might be correct.
If you want to stay, ask your lead for regular one on ones. I find it helps to have one on ones so you can talk about what's troubling you. It could be that your lead isn't sure how you feel yet because you haven't told them. They might have some ideas on how to help you. Document what was said so you have a paper trail.
Another question to ask; what are the expectations for a junior artist? Making sure you are 100% clear on your expectations will help clear up any confusion, especially if you feel like as a junior you should be meeting expectations. A lot of these conflicts happen when there are expectations someone has of you that you didn't know about.
More or less, the best thing you can do for yourself now is build trust, trust between yourself and your teammates. Once you have trust, honest to-your-face critique and safety will follow.
Good luck to you, that sounds really stressful and I hope you get your situation sorted out soon. If anything, this might just be a learning experience and growth opportunity for you, though a hard one.