screw over
verb
- to treat someone unfairly and badly, put or leave in a bad situation
Wiktionary
verb
- To cheat someone, or ruin their chances in a game or other situation.
“I would have won the game but you screwed me over when I landed on Mayfair.”
“If you didn't betray your most reliable ally just so you could win in a game of soccer, you wouldn't have screwed yourself over by getting reprimanded and disqualified in front of everyone.”