Essentially, ESL_Teatime said that all bulldog could do was throw out a couple of spells during a teamfight, and that he was washed up aside from being a "celebrity".
Original reddit thread :
The Caster also seemed to indicate a grudge against bulldog over the starladder/esl drama (accusing him of starting drama by streaming)
Caster's defense :
Bulldog's response (in meme form, of course)
(closest thing to a valve response we're likely to see):
Various community responses :