Why are people not making PROPER decent full games for these devices?
It's such a waste.
This question has a very simple explanation - it's cost. Graphically intensive games require incredible amounts of man power to design the graphics. Console games still easily fetch $20/$40/$60/$80 each, and each console platform, though having a smaller user base, typically has only a dozen cutting edge games to compete with, and many players buy them all. So if you make a high end console game, you're gonna easily make $30 million - $200 million in revenue, and some of these games can easily cost $50 million to make.
iOS has major controller issues leading to games you just tap with one finger, but the biggest issue (ironically) is it's really hard for most games to get enough revenue to be that good. There are exceptions, but those need to spend tens of millions on advertising as well, and most still can't both charge dozens of dollars and hit big sales numbers. The best hope is to do low cost ports of console games to iOS, which means solving the controller issue.
However, if you were a developer, and could instead have one person invest $100K to create a simple side scroller in a year, you might make a lot more money.
