You understand you are basically saying you don't like the way he looks, and consequently you are not really a fan.You don't have to agree. And while i'm sure he's had to fight back from injuries many times, i still didn't see a guy that would rather eat his bike than getting dropped. It's also not just about facial expressions, but squeezing the last bit of strength out of your body, about suffering. Obviously, this is down to interpretation, but to me he didn't look like that at all.
It's all fine at the end of the day because that's actually a huge part of sports and being a fan of one rider and not of another.