I actually disagree. Level 60 is not a good gauge as to whether the game is for you. The GW2 sub is balls to the wall dead set on “never use your free 80 boost,” so you can learn the game and experience the story. But the quality of combat in expansion content is head and shoulders above the core game. A lot of people, like OP, form their opinions on the quality of the game based on the worst content that ArenaNet has ever made.

I think a lot of people find the combat boring because they only play the base game, where you can just run at everything and spam 1-2 keys and kill everything. They quit before they ever experience actual depth in combat that the expacs.