Some of us eat our extra roosters. I know that answer is not much help to some people.
You can give them away or maybe sell them, usually not for a lot. If you are in the USA, a lot of people use Craigslist. When you give ownership to others, you lose control over what they do with them. Usually they are eaten.
It depends on your circumstances and set-up but some people can handle multiple roosters. It’s a lot easier to do that if you are in a rural area instead of suburbia. If you have a lot of room (a LOT of room), you can sometimes let them free range with the flock and let the roosters sort out dominance issues.
Some people build bachelor pads, a separate coop for the boys with no girls allowed. As long as they don’t have any hens to fight over they are usually pretty peaceful together.
There are some options but yes, it can be a problem.