OP has a legit point...
Guys like The Roots,Wu Tang, Common and De La used to stay throwing shots at Pac and Big and callin them sellouts...
Then something happened at some point in the mid 90's where an Oakland slang term called "playa haters" was introduced to the mainstream and made anyone with any success in the culture above reproach..
So now the same dudes that would have sh1tted on 2Chainz, Ross, Trinidad or Drake in the 90's feel pressured into embracing them out of fear of getting the scarlett letter of "hater" from the fans and industry Super Friends...
The term "hater" (OP used it in his thread title) has ruined all objective criticism in the culture..
Talented broke rapper can't criticize untalented rich rapper because.......Well, you know...