but don’t you hate your life or makes it very miserable and tiring?

I mean, expecting everyone to fuck me over would make me angrier I believe, like going to work and constantly ruminate about how every coworker and client is going to ruin my day.

If you are a cynic, how do you don’t ruminate?

or is cynicism more ‘no expectations no disappointments’?

You need a different manager. Distancing yourself from the one you have doesn’t sound realistic: Their job is to not be distant.

I’m lost here: what is their job?

Most of my co-workers don’t like me. My boss doesn’t even like me.

if your boss makes clear he doesn’t like you, why are you still working there and why don’t you have plans to quit?

I mean I don’t understand why this is not a reason good enough to start looking for employment elsewhere. Don’t you find it tiring? don’t your coworkers and boss wear you down?

If my boss makes clear he doesn’t like me it’s only a matter of time before he starts treating me differently, giving me the worse assignments, refusing to acknowledge me…

This would affect me to the point of starting to hate that person.