Hi,
Not necessarily the end of 2nd year, I just know from experience that the winter semester is never when you're feeling at your most positive so I was thinking of giving yourself until maybe April.
It wouldn't be fair for me to say "just stick with it, I promise you'll come to love it" because everyone's different and every job isn't for everyone. All I would urge you to do is to bear in mind, as I said above, that in some ways, you're currently at the most stressful part of the course and everyone struggles whether they say so or not (incidentally, well done for speaking up). If as time goes by you feel that this really isn't for you then there's nothing to be ashamed of in that. I'm in my 30s now and looking back, it's very harsh to ask people in their late teens/early twenties to make decisions about a career, particularly since, through no fault of your own, you don't actually have a full understanding of it yet.
If I could give you 2 more bits of advice, if it doesn't sound too patronising, I'd say (and these might sound contradictory)
1 - if you have a "dream job" in mind don't settle for anything other than that, you have to work for a long time and doing something you don't enjoy makes it much harder. Pick the career that excites you, not the one people tell you is "the sensible option".
2 - at the same time, don't be intimidated by the thought of "wasting" a year here or there, believe me, in the grand scheme of things it's no time at all. I'm assuming you're 18-20 in which case you're going to be working for approx the next 45yrs, even if it takes you 5yrs or more to find the career that's right for you, that's nothing and it will absolutely pay off.
Lastly, reach out to your tutors and lecturers, they can give you a realistic view of your academic position and they can support you both with the course/placement and in making the right decision for you. I certainly wouldn't make a big decisions without talking to them first. I know this is a really hard time, but please believe me, whatever happens, in 5yrs time you'll either be fully qualified and pleased you stuck it out, or you'll be in a new career and making progress in that - either way you'll be succeeding.