That’s a very negative view of humanity. Everyone I know, from phds to blue collar workers, have great things they aspire to, if only they had the time. You must hang out with real losers if that’s what you think is reality, or you must be listening to the media representations of the worst of us.
I have great things I aspire to, too, that I'm not actively working on. Instead I'm wasting my time getting flamed on some toxic website. I guess I'm a real loser! But I don't think I'm much worse than average. At least I don't beat my kids.
You can see what people do with total freedom by looking at retirees, the rich, the temporarily unemployed, people on disability, and NEETs. Some of them do the great things they aspire to. Most of them don't. I still think more freedom is a net good.
Your problem was that you stated that most people on UBI will resort to beating their children. What is ironic:
This is only one anecdote, but the only person I know which perfectly matches your typical child-beater profile, couldn't stand being unproductive on retirement and got back to work at local carpentry shop, as a helper. Not because he needs money, but because he needs something to do.
What's "your typical child-beater profile"? I don't think there is one, other than "human" or possibly "male human". Plenty of exceptions even to that. Child abuse is not universal but dishearteningly common.
Apart from exactly matching what media and popular culture portrays as child-beaters, his daughter confirmed that he abused her many years ago. He also cheated his wife, and done many things which are stupid or considered by popular culture approptiate for what could be called pathology-circles. I don't know how you call such people in english.