Well that was an interesting decision. Do you have a degree you'd rather be doing? Would it be worth dropping out and starting something else next year?
If you don't enjoy the work you aren't going to be able to put in the work to do well in it, and at that point the virtue of having done 'the hardest degree' (a debatable claim, I'd probably say there are other courses out there that are more work) is kind of moot.
If you have any kind of academic advisor at your uni I'd say talking to them about this would be a good idea