Or, they’ll be like the OP and just ignore a new coworker entirely and never even say hello, which is also kinda rude and makes people think you’re mad all the time.
Same. Outside from a quick hello (and I mean quick) to people I've deemed friendly, I'll only talk if the job I'm doing demands it. I won't be rude if someone asks me something, but the answer will also be quick and to the point.