Realistically how difficult is university compared to community college?

Right now I am going to community college for electrical technology. I find it interesting enough to be interested in going for an electrical engineering degree. That being said I have heard some pretty unconventional things about University. One person i know that is in Uni talked about having to do 10 assignments in one week and that was only just for one class, I mean how is that humanly possible. paying almost 700 dollars for a class and a high chance of failing doesn't seems like a win-win scenario to me.

Obviously I am in community college now and it is probably no where near the level of 3000 classes. I mean do all Uni people just put there nose to the grindstone and just study all day?

Edit: thanks for the input guys. Appreciate the advice