Could be said about almost every sport to be honest. The American sports are stop-start with adverts crammed into every break in play, cricket is long and pretty uneventful, rugby is relatively repetitive with little room for the sort of individual brilliance that makes players of other sports famous, and the Olympics is pretty much just watching different people do the same things in similar times every 4 years. And that's coming from somebody that likes all of them (aside from cricket).
I guess football attracts the most criticism since it's probably the most popular sport in the world. But I always find the negative posts on Facebook during a major football tournament, sandwiched between enthusiastic comments about shows like Love Island, a little strange. Some people obviously get some amusement out of expressing their dislike for football, despite displaying their own questionable tastes to the world.