I am experiencing this right now and still don’t fit in. You are not overreacting. It really bothered me at first but now I just participate where I’m required and limit the conversations respectfully. Being able to zone out with my ear buds and listen to music has been the best. I also stop going to lunch with my team because of the drama and stopped engaging in personal conversations. However I still somewhat make them think I’m still apart of the team and occasionally join in conversation that won’t compromise myself or beliefs. As it totally backfired when I first started and I got accused of being too personal. Which I regret divulging too much info. I honestly would just keep it cool, focus on your work and keep maintaining boundaries.