I guess that's my fault for having a full time job, and an actual life outside of Rock Band Blitz. MY BAD GUYS.
It doesn't matter why you're not good at something, if you're not good at it, you're not good at it. More power to you for having a life and probably doing things more important than a silly video game, but it's completely selfish to want to bring people who did put time and effort into something down to your level while also claiming not to care about it.
You seem to have a persecution complex about being "casual" when that's not really the issue here.