Anytime you get a player who wins matches mainly with his brain rather than by bashing the ball as hard as he can, he is hated and called a pusher.
It got me thinking: does this happen in any other sport?
Do football (soccer for you Americans) fans moan about the players trying the construct plays and just wishing that the players would kick the ball...harder. Wherever they are on the pitch, who cares - just kick the football harder. That's fun to watch.
Do boxing fans complain when their favorite is ducking and weaving all over the place, being a strategic nightmare to fight against? Do they just want to see two people stand still, taking punches to the face, and punching the other guy harder in the face?
Yes and no I guess
In boxing, it's always impressive to see a KO in the first or second round, even though it's a wasted money for those who came expecting to see 12 rounds. In basketball - some teams play run'n'gun basketball, which should be equivalent of ballbashing and equally (in)effective
Perhaps "pushing" is more slammed in tennis than in other sports, however I don't think this forum is actually a good example of representative opinion in tennis, it has its own favorites, biases etc.