If i player ban my champion and I said im going to play him

1. what champ were you going to play.

2. how far down in picking order were you?

No, one curse or something wouldn't really do much toward a ban.

one hate speech or death treat does tho.

if you we're hovering over Yasuo then you should expect ppl to ban your champ in most of the games

Unless it was done solely to spite you, no.