[M 27] I Think My Brother [25 M] Is Trying To Create A Mental Break

Hi guys,

I recently [18 months] moved back in with him (mostly out of work stoner) and our mother [50s] for financial reasons. After a few months of loud behavior from him and his friends [two 26 M's] (also jobless stoners) my mother asked to not have guests over past midnight.

Since then I've noticed (it may have been going on before) his friends acting very passive aggressive towards me, and or constantly trying to invalidate me. Some examples are: them asking me questions (seemingly friendly) and interrupting me or ignoring me when I respond, constantly making repetitive sounds when they're near me, saying things to me that they think will get a rise out of me, or just making off hand passive aggressive comments towards me. I tried to be respectful towards them, and I don't want to tell my brother who to be friends with.

So I've tried to avoid contact with them (ignoring them when they come over, removing them from social media connections, etc.). It was going good, and one of the antagonists who frequented the most stopped coming over as often, and have only bumped into him once in the past two months. Still, when he does come over he now slams every door that he goes through very loudly (sometimes enough to shake the whole house), and revs his engine loudly when coming and going (which happens at any hour of the day or night). My mother also annoyed by the door slamming has since asked him to stop making so much noise when he comes over.

Now (about 1 month) my brother has been slamming his bedroom and bathroom door (both adjacent to my bedroom) at all hours. He does this periodically and at all hours of the night. Sometimes he comes back at 4 a.m., sometimes it's midnight, sometimes it's 7 a.m, either way he's doing it. I'm not the heaviest of sleepers, but I do like to maintain regular sleeping hours, and the door slamming has been waking me up. Since that behavior has begun I've been starting to notice that whenever I do anything when it's just my brother and myself in the house he does loud throat clearing sound (at first I didn't pay much attention to it, but have been recognizing it recently). I recently asked him if he was slamming doors intentionally and he said no. Since then he's stopped doing it when my mother is around, but continues when it's just he and I. Or me sleeping and him and his friend, who now (1 day) also slams the toilet seat down. These sounds wake me up and I haven't had a good nights sleep here in a while. It's gotten under my skin so much that now I cant get into a deep sleep because of conditioning of expecting a door slam or a throat clear to wake me up. Even as I lie down I can't seem to sleep more than 2 hours.

I'd like to believe he wouldn't do something like that intentionally, but I think he's trying to create trouble for me. Also considering one of his friends is a master psychological manipulator (basically a troll irl that loves to argue and get in people's heads), I sometimes think he's just trying to create a rift between me and my brother.

I don't plan on living here much longer (I'm finally getting back on my feet), but I still would like advice on how to deal with this. Are my brother and his friends trying to mentally break me down or am I just being paranoid? Please help.

TL;DR: I suspect my bum stoner brother and his bum stoner friends of trying to cause me to have a mental breakdown, and I don't know how to remedy the situation.

[Apologies for any typos, I am only mobile]