You do realize that "gaming" case is nothing more than a marketing hoot, and it got nothing to do with it. In reality, all cases should be well made with proper ventilation with optional fan mounting options, HDD caddies, space, depth, etc. Although some of those gaming cases have that 'design' front panel which is said to appeal to gamers, whereas some cases made people to believe that gaming cases, except the higher cost ones, to be another name for cheap cases with 'the looks'.
It depends more on the system configuration you're on. I am not sure your defination of 'sucks', though. If you're not having a problem with the case, then what problem you're exactly talking about?