The biggest gripe is Herb/Mining. The newest resource was not added/changed for the latest patch 8.3 locations. There is a very low amount of players in Nazjatar, extremely low. The majority are there for gathering herbs. It just compounds on itself. If they added zin to Uldum or Valley, the amount of complaints would go way down.
This specific issue will disappear in Shadowlands, unless the same scenario happens again.
The 4x2 farming really doesn't affect/hurt anyone, for some it's just unpleasant to look at.
The PvP no follow rule has always been under the guise of stopping botters, in BG's it's still a fair fight because the numbers are even. And when you play amazing, have a huge chunk of HK's and are playing the map effectively, you still don't win as I show in a couple of videos.
We are at pretty much a disadvantage at every corner and the majority of us have good intentions and play by the rules. Every bucket has a few bad apples and it's an easy target.

Honestly as soon as Shadowlands comes out - this will wash away.