Yes, for both hate and love, it also has to do with his nationality (not only).
Yes, other players get a lot of shit from hltv users, but not "most players", as the message I replied to said. Few others. Still, i'm not sure about the "much more hatred"(unless you count zywoo vs s1mple fanboy fights as hatred).
No, it is not because FalleN has more bad games than other players, he's just on the average for that. There are players with much more frequent bad games, and that are on teams getting less results, that still don't get an ounce of toxicity, much less daily hate threads.
I have my theories. He is very famous, as "astralis_6_majors" said. He is not in the best moment of his career, and when he was, that meant everyone's favorite teams were getting destroyed. It is a "kicking a dog when it's down" mentality.