Well, there is a little context provided by the post itself. While a lot of people seem to be calling him toxic, he comes off as quite genuine to me.
Personally I've met and worked with lots of people that were in many ways friendly and genuine but had some weakness or quirk that induced them to mistreat their coworkers.
The second kind of people you mention are, well, human. Such small transgressions exist in family and among friends as well.