Completely agree uni is hyped up when reality is your thrown into a new place, with strangers, completely different style of working and theres huge pressure to act a certain way. Reality is it can be extremely lonely, you can miss home comforts and family and friends, a lot of people are out there to prove they're cool which gets irritating, it takes a while to settle down and work out who really are your friends and to get into routine with work.
I'm getting there but still have days I just think stuff this, I want to go home. Its tiring and emotionally draining, nights out get boring and even by the end of first term while you have friends you don't REALLY know them.
Think your error is work, the lower your lecture hours the more youre likely to need to do in your own time. Even if you don't feel you have anything just make work, do some reading, go to the library to break up the hours... remember youre at uni to get a degree at the end of the day, to go on to get a job doing something your passionate about so really motivate yourself to work and do extra so you have greater chances of getting a first.