ARAM really needs some changes.
The most important is that every champion can be rolled during an ARAM instead of the ones you own or on free champion rotation. No more ARAM smurfs and try hard nonsense.
I also think ARAMs should start you at level 6 instead of level 3. It will make a lot of melees more useful in the first few minutes instead of being hot garbage for some of it.
Possibly increase starting to to 3-4k gold. Get one completed item to help you face your enemy.