^Did he say it sucked (like it does) or did he praise it?
So you think it sucks? Fine. That doesn't mean that Zero's review of it is correct just because you agree with it. The sales figures speak for themselves and the game is rather popular. It may not have the popularity of Halo or Call of Duty, but Borderlands is a decent franchise; unfortunately, it's not everyone's cup of tea.
In short, opinions are opinions and they're still opinions even when voiced by celebrities, professionals or strangers. I like Borderlands and I like Borderlands 2, and clearly I don't think it sucks; changes were made, and it's Human nature to adapt. In fact, evolution is based on change, so if you're not accepting change, you're not evolving, and if you're not evolving, your line will go extinct.