Shounen Jump is a weekly, and I think the incredible time pressure that involves - like, 20 or 30 pages scripted, drawn, inked, etc, every week!? - dooms even the best mangaka to Endless Epic Fights, especially when writer's block hits. The good shounen/seinen manga - they're out there! - are more likely to be found in the monthly magazines. (Lately I'm grooving on Piano no Mori, The Piano Forest.)