Do managers and colleagues behave rude when you're serving notice period?

Only if they're the type of shithead who thinks they did you a favor and you should be grateful for the job "they gave you."

@SortOfTested true, was supposed to get my appraisals this month delayed and taking advantage of my passion and not giving me my worth. Damn frustrated..

Only the ones that don't want you there to begin with, now there's no filter or repercussions once your out that door.

Depends on personality of an exact manager you’re talking about. SortOfTested were spot on

I've never had that problem but I imagine it happens.

Granted I also worked at places where any notice and they walk you out of the building immediately (it sounds rude but IMO I thought it was a good security choice and everyone knew it was the rule).

Tags. No.

Mine panicked and arranged an emergency meeting of the management team to renegotiate my contract. 🤷‍♂️

Just need to get yourself decent managers who appreciate your contributions.