-The whole concept of the chimera ants was cheesy. they dont look close like ants after the first episode. They just suddenly become every animal you can think of. And they are talking animals. And they instantly develop a sophisticated civilization.
-Chimera ants learn how to use nen by getting punched by the most disturbing character. And they are instantly able to use nen with zero training. And they are all more overpowered than Hunters who have trained nen for years.
-Pouf's very existence
-the King survived an atomic bomb
-hardly remember the other ridiculous things that happened, but
-Gon going super saiyan and aging 20 years is what sent me over the edge. I put up with all of that for so long for a horrible end of the arc.