If you are prepared for the consequences of dropping out, then do what you think is positive for your future.
There has always been successful people who did not recieve education of quality because they knew unis are not the right places for them. They were confident in themselves that they would have greater achievement without those professors. But I am not encouraging you to just quit. I mean , you gotta have some spotlights on yourself. You must be intelligent in something, Find it out and see what you can to make the greatest use of it. Make it your expertise.
As many people have said, your are a grown up. You have to be rational and gain courage to face the facts.