So I'll go out on a limb here and admit that it can be humiliating to get thrashed by someone.
If the guy is famous, thrashing is expected so I don't really care. But there are some less than famous guys out there that can thrash me too, and I don't like that at all. It makes me better so I try to train with them as much as I can, but it's still humiliating to get owned so badly.
It doesn't happen very much anymore, but there are about two guys I train with semi-regularly that just own me completely. One guy is about three weight classes bigger and the other guy is exactly the same size.
They are perfect training partners (particularly same size guy), but yeah it's pretty embarrassing. People say don't be embarrassed but I still am.