How can I best provoke you into saying something sardonic and witty about why you have university so low?
I don't have much to say other than that University is a good card but those above it are even better!
Thinking a bit more: the best thing in Dominion is generally to reliably draw your deck each turn and play all actions you have (which should also be the best actions you could have). Cards that really help you do this (Wharf, Chapel) or prevent your opponent from doing this (Cultist, Witch) are very strong; cards that sit in the way without doing much of anything (Harvest, Cache) are very weak.
University lets you gain 5 costs, which is obviously great, but unless these 5-costs are spammable and actively help you to increase deck-drawing reliability (say Wharf, Lab, Governor, Minion—when these are on the board University is fantastic) you don't want to gain a bunch of 5 costs indiscriminately, and then there is the underestimated cost of University itself, which doesn't just require getting a Potion and having it floating around in your deck, but the University itself prevents you from drawing other cards. Sure it's a village, but you don't go around spamming Squires either (well, some people do, but it's generally very bad).
To give an example: if you start your hand with University-Smithy, you end up increasing its size by 1, whereas this would have been 2 had the University been an ordinary Village. So another way to look at it—a way I imagine Mic will absolutely love—is that every time you play University, you cost yourself an immediate lab-effect relative to playing a normal village.
Of course there are some solid counter-arguments that I'd happily agree with, but I'm not claiming that I'd rather have a Village than a University, I'm just saying that this is a factor you'd easily overlook if you haven't built a ton of engines and developed an awareness for the different building speeds these cards bring with them.