Why does everyone hate the rivercard?
At first, the enemys, who hit the nut at the river, don't hate that

But the really problem is not that you beated with the rivercard and lost that pot. The problem is: if your play was good, can you play that(and other) hand same again in the future or get crazy?
The problem when you don't see the odds, and try beat your enemy at the river...
Tilt. I don't hate the rivercard, I hate the tilt...