I just posted an old & often repeated saying on another thread:
You can make a big school small, but you cannot make a small school big.
OP: You should be able to find what you are seeking at your current school. Often it takes time to grow into a national university. As suggested above, if you want ease of transition and immediate satisfaction, then an LAC probably works better than a large university during one’s first semester & during one’s first year. It can take an entire year in order to find one’s comfort zone at a large university–doesn’t have to be that way, and often isn’t, but the rewards are there in the later years as suggested above.
OP: Transferring to an LAC may be a step back. Why not transfer to an elite National University. Plenty of small classes & lots of intellectual discussion. Lots of comfort to be found & lots of uncomfortable growth experiences to be had.