I've seen him claim that Apple's "service is atrocious" yet their service is consistently ranked at the top.[2][3] Other times, he'll give some lame anecdote about his friend's MacBook constantly needing repair or receiving bricked iPhones. I have no idea if those stories are true, but if we made a poll, I think we'd find that he's exaggerating.
Once a troll in the poker world, today he's moved to this little corner of the Internet. Matt: we still hate your online persona.[4]
[1] http://searchyc.com/mattmaroon+apple
[2] http://news.ycombinator.com/item?id=150563
[3] http://blogs.zdnet.com/Apple/?p=1689
[4] http://mazeorbowie.blogspot.com/2006/12/why-i-hate-matt-maro...