Talking shit about people behind their back is not abuse. At most it can be libel/slander, of which none of your examples qualify. She's also not a particularly worthy example, given her meltdown at that tennis tournament, for which tons of people tried to made ideological excuses (herself included) and which involved her actually being abusive to the ref's face.

What it is is rich and powerful people using their influence to step on the little guy, and that behavior trickling down in a bizarre quest for faux-vindication by petty commissars. The kind of person who wants to be a Reddit mod on a big subreddit is not your average Joe. If they're not outright getting paid under the table by interested actors, they're doing it for the power trip.