Don't think too much about this because you might eventually overthink this and end up stressing out about it which is not worth at all. There'll always be some creeping thoughts of regret about choices, especially ones that seem extremely important. But at then end of the day, you made the choices and you have to own up and stick to them. There must have been reasons why you came to Manchester. Think about those, think about the good things that you've gotten out of UoM because you can't go back and change anything. Just go with the flow. I also recently had thoughts of regret regarding my uni choice (for different reasons). I am also a first year student at UoM like you, studying MechEng. I was given the opportunity to choose between studying in Toronto or Manchester which of course I ended up with the latter. Overtime I felt like I made a terrible mistake considering how I was given the chance to study in a different continent, at a highly reputable school as a plus. I didn't have the greatest start to uni, being hit with COVID during Freshers Week and all, but I just keep reminding myself that I had my initial reasons to picking UoM and I should own up to them. And like you said, perhaps going to Toronto or Bristol in your case would be worse off. We will never know, all we can do is make the best of our time and the path we chose. Besides, UoM is a great uni to go to, with amazing social life, high academic reputation etc. It's a great place to be.