Part of it i think is that we all have blindspots, and we forget that while objectively bad things exist in entertainment, objectively good things are harder to prove, and a great deal of it all is opinion. Sometimes you just like something. It isn't always rational or categorical.

My example is Gears and Halo. I've never liked gears and halo has defined by view of storytelling more than almost anything other than LOTR and Star Wars. Gears was fun enough to play, I just didn't care about the characters or story at all. And ultimately if you strip them down to their bare "stoic solider fights endless bugs against impossible odds" they aren't that different. But i didn't like one and love the other. So it goes