And why would that bother you anyway? You dont have to play with these people, so why would you care if they re-roll or not?
I don't mind saying it...
Re-rolling and cheating should be dissuaded and stopped whenever possible.
You "Beat the game", but if you are constantly "cheating" to have it your way, your only achievement is that you have cheated. That mind set is not something to strive for.
You might as well load your character and declare yourself a winner. Tell your friends that you are so good you don't even need to play the game to win.
If the game is too difficult for you, you should perhaps play something else (Ludo comes to mind) or try to improve.