i always like being the new person at work. perfect excuse for why something isnt perfect! "oops sorry! i am new here!"

The solution: Be uncompromising

TNG - S05E03 - Ensign Ro

Want some anxiety? The coworkers are totally gossiping on everything about you.

What's worse is this, work in a place thats been around for 40+ years owned by one guy and worked at by the same people for decades. Come in as the young new guy with no experience working with the people who have a couple decades more than you. Then work there for 20 years but always be 20-30 years behind them no matter what. You get more experience, but so do they. You can never not be the fuckin new guy. The job is tough, but everyone makes money, so no one ever leaves. So, you're always the new guy, but you're not going anywhere either because you know, they all have to retire sometime and then the whole thing will be yours.

Same, so so awkward

A healthy work environment is welcoming to a new employee, happy and eager to see that the collective enterprise everyone is involved in is growing and changing, still persisting, like a living thing.

An unhealthy work environment fundamentally views work as toil, pain and suffering, where a new employee is a foolish outsider to their particular trauma based clique because the noobie has not yet sufficiently suffered.

So, barring something like impostor syndrome, no its not no reason, the reason is that you've entered into a toxic dysfunctional work culture.

Stop caring and be the new character that everyone feels like they've been there from the start.

Its best to make a splash as the villain I've found

Refuse this feeling: these assholes are in the same boat as you but only managed to be in this particular one a bit longer then you. That's all there is to it.

Isn't that the literal situation for the actor in that case?