"Not being a team player" doesn't mean the person is a nuisance, but they can be an introvert who has a limited interaction budget and can work silently and efficiently otherwise.

This generally means the person might not leave their cubicle much or give feedback frequent enough, but this doesn't mean they are not motivated to help others or share knowledge. One can approach and ask a question and get tons of help immediately.

How I know? That's me. I look like a cave dweller from a distance, but I'm not. The only difference I have is human interaction sometimes drains me a lot, so I just concentrate and work, yet everybody get their help immediately if they need them.

Also, no, I don't bite or belittle people. On the contrary.

Assuming the worst in others is bad. If I worked with you, I'd be looking for somewhere else the moment I found out how you think about me.

Remember. People don't leave bad jobs, but bad managers.