I don't like the Endurance Runs.
If you don't like the Endurance Runs then you don't like Giant Bomb. Because you don't like Giant Bomb, why are you here?
I don't like the ER either and I'm okay with enjoying the rest of the site content.
Edit: In response to the OP, if the grinding is getting you down than I would consider just putting the game down. If not that, at least give yourself a little bit of distance from it and pick it up later. Trying to go at this all at once seems unreasonable and I can totally see why grinding isn't any fun after 40 hours.