Have you tried taking a look at one of many good videos on YouTube to learn how to use the G1000? It's far from intuitive, and using one of those tutorials, you'd know if it was you or the sim that was not working right.
I understand your position and concerns, but as I've written a number of times MSFS is a new sim, and just like all the past "new" releases of base sim products it's going to take time for it to mature. MSFS uses more integrated and external technology than any past or present sim, so once the sim has matured I'm confident that the issues you cited will be resolved - and if not then (again, just like past sims) third party developers will step in and improve them.
This is very complex stuff, and those who grow with MSFS will have a keen understanding of the sim.