Ethics andgood poker table manners

[BPMaR]

I have a friend who constantly does the following:
1. Always asks to see the losing hand that was mucked?
2. Always grabs the pot and manually counts it?
3. makes guess attempts during a hand where he is not involved like " Ooh he definitely has a flush watch out"

So I just wanna know if this behavior is normal or bad manners, because it's really annoying.