There is another student on here with almost an identical post to yours, only different universities. The student was so sure he had to transfer somewhere else, and now that he is at the new university, he regrets it and wishes he was back at the other one.
There’s no perfect place. Don’t let other people make you feel bad for leaving UIUC. I know someone who left Harvard to go to a state university in the South. She just couldn’t stand being at Harvard, and felt out of place with the people there. She did what she felt was right at the time, for her peace of mind. That’s all we can do in life.
You will find other things to like about your current place. Just try to embrace it for what it is, instead of fretting over what it isn’t. Trust your gut which told you to leave UIUC for somewhere closer to home and in the city, and make the best of the lifestyle options you now have.