I am not a medical student, but if you don't mind I'll share my thoughts. You sound like a very nice person. Like the type of person that would go out of their way to help other people e.g in their studies. And do you know what? people with your qualities are what we need in healthcare and not those who go around with their noxious attitude (those whom you described).
Medicine is not an easy course. What I can say to you is remember you may not like the university life, but you may love working as a doctor. Thus the main question is, are you happy with perusing a career in medicine or not because those are the long term factors.
I feel it is your environment that is the main thing giving you the bad taste for medicine. You worked very hard to get into medicine, I am sure of it. Never let bunch of immature, petty students dictate your life. Trust me, my course was full of them too.
When I started pharmacy school, one of the boys was a 3rd year dentistry student and he had dropped out to study pharmacy. He dropped out because he was not enjoying dentistry, but after two years of pharmacy, he dropped out again and from my understanding, he held regrets about leaving dentistry. If you're giving thoughts to leaving, make sure you're clear about what other paths you want to follow. Your parents wishes are important to some degree, but they're not the ones living your life. Parents should support their children and encourage their child to pursue a path of happiness not a path that makes the parents happy. I can't/ will not tell you what to do, but If I was in your situation, I would continue the course till I am in my clinical years and see how I feel at that time. For the time being, go on holiday, take some time off and give yourself some fresh air and see if your perspective changes.
Whatever decision you make, I wish you all the best.