You’re right and the down votes are reactionary. The alternative to the state having a monopoly on violence is even more violent parties. The benefit of a monopoly is violence resting with the state is that the violence is subjected to checks and balances. Perhaps those checks and balances aren’t as restrictive as we might like, but the alternative is unchecked violence.
Obviously we prefer no violence, and yes violence is abused by parties within the state. But that’s a separate issue. If we dismantled the monopoly, violence would skyrocket and what little regulation our institutions enforce would vanish. That’s objectively worse
The world is a nasty place, solutions being unsavory doesn’t preclude them being the best option.