It's because I was the first consistent Google critic
I'm a Google critic and I can't speak for Brett but trust me, he's often a critic [webmasterworld.com] and starts threads critical of Google so you're overlooking that subtle point.
Critics are never banned, nor are fan boys.
However, people with an axe to grind that don't contribute anything of any value to the conversation but their love or loathing of the company or product really don't enhance the discussion or the community.
What value does every thread about Google have if 20 people chime in "Google sucks" without adding any pertinent information about the specific topic?