Any sort of band member bashing is based on insecurity. You never see a dude who is confident in what he does for the band bashing on another member of their band...
I'm in a power metal band. I have 2 shredding, over the top guitar players and a keyboard player who was born to make music to a point that it pisses me off, and I love all of them like brothers. One of them I've been playing with for 7 years. He's my best friend, we've been able to write music together that neither of us have ever experienced anything like with other bands. Over the past 7 years I've wanted to strangle him more times than I can count, which is probably right about the same number of times he's wanted to strangle me.
When I read someone talk about a "guitard" on this forum, I feel sorry for them for not having the relationship that I do with the rest of their band. The only people I've ever had in my band that I've ever made derogatory remarks about similar to "guitard" are people that we ended up replacing because they couldn't keep up with what we expected.
If you don't respect your fellow musicians, how do you expect your music to work? Don't play music you don't love, don't play with musicians you don't respect. And don't suck...