Shaman King's problem wasn't that it had a tournament.
It's that it had a tournament that became the entire series for hundreds of chapters. (I think it started its tournament around chapter 40 and that lasted through to the end, around chapter 300? )
It had a myriad of other problems too, but.
@EvoWarrior5:
When did Arlong Park become a forum where 50% of what's talked about is calling other manga's shit?
It… hasn't? If you really think its 50% you haven't looked around the site very much.
There's only a handful of series that regularly get called out for being bad, and rightly so.
Naruto, Bleach, Fairy Tail, Shaman King, all deserve what they get. But tons of other series have threads of nothing but praise. Hell, Shamn King doesn't even get mentioned except offhand. Hunter x Hunter gets shit for it's hiatuses and scribble art, but praise for the actual series. Negima gets slammed for its ending, but praise for the rest of it.
Ass Class, billy Bat, Magi, Sket Dance, Shokugeki no Soma, Kenichi, World Trigger, Meaka Box, The Breaker, One Punch Man, Jojo, Cross Manage, Toriko, Ghibli... all on the first page of the manga thread and all get talked about positively.