Like other people say, the finance will be tricky. I'm in a similar situation to you- I don't enjoy uni but I couldn't finance another degree.
There's things to weigh up. Dropping out of uni several times could make potential employers question how reliable you are. Staying another year isn't all that long, with the right support do you think you could stick it out? On the flip side, you don't have any responsibilities yet like kids (I'm assuming) so why should you be stuck in something you don't like? I don't know if all people see it this way but personally I have more respect for someone who chooses to do what makes them happy and be bold and take risks, rather than someone who's miserable and just tolerates life.
Is uni the right thing for you? I'm the brains of my family too, I got good grades, since I was a kid it was just assumed I was going to go to uni and be successful etc etc. but it doesn't mean uni actually right for me. If you have a long term career goal that your degree will help you achieve then great, but if not then ask yourself why you're still there.
It really is a tough one- I've felt torn between being realistic and being hopeful. The whole idea pf dropping out and going on to discover something that makes you happy is very naive to some people. But if you don't try and change things, they're not gonna change. My parents always told me to do the sensible thing, get a degree and any job that pays. Like they did. You know where that got them? In their 50s, working jobs they hate just to pay off a mortgage on a house in an area they don't even want to live in. You've got to question how sensible these 'sensible and realistic' people are.
Take some time to think about what you want. I'm trying to find a placement related to my degree that looks enjoyable so I get a year off from being at uni and all the lectures whilst it still looking like part of my degree and like I'm being productive and purposeful. At the end of the day we can't tell you the right thing to do, it's totally personal, there is no wrong or right. Whatever you choose though, life goes on. Work out what's right for you and follow it.