Those generalizations are harmful indeed and should not be tolerated as it breeds Us vs. Them mentality. Just asking the person not to be offended when they have every right to be with “if you are not part of the problem” is the modernized “I am not racist, but” and “No, I meant the other type of foreigners, not you”. Misandry is a thing. Just because one comes from a misogynistic surrounding, doesn’t mean other experiences are suddenly not real.
People bound by unhinged radical feminists, and I do mean the Crazy-Karen-On-Video crowd, mutter every other second a misandric sentence. Of course this crap erodes your self-worth. You are literally being demeaned for absolutely nothing. Speak up to shut them up. If women find the energy to speak against harmful notions like, so should everyone else, if they see inacceptably demeaning behaviour which differs fundamentally from appropriate criticism.
From personal experience susceptible people get paranoid schizophrenia like symptoms with cannabis use immediately, which should be a warning. From a scientific angle there are statistic links, but not a proven causal link. But we do know it reduces hippocampal volume which probably isn’t healthy, and hyperemetic syndrome tells that it does have negative lasting effects.
Truth is, you probably should not do it, but likely it’s not going to wreck you either. Nobody knows for sure what will happen to you.