Yeah I think a lot of what undergirds a lot of the dislike of him is that he's atypically "low T" and skinny for what you would expect of a Hollywood actor, who are all buff hunks or adonis-like twinks or fat comic reliefs. It's similar to the hate people have for fat women that oozes out when they talk about them.

Scott's character is an immature jerk for sure. Some of Michael Cera's characters are sweet and cool though, like George Michael.