Hi Mike-
You typed out a post - so it feels like you do care about this game and enjoy at least some parts of it. Most of the GAC complaints in here are arguing the other side- they are matched against opponents 2+ mil higher.
Without and account links my first assumption would be that there is a discrepancy with mods or datacrons. My account is not highly tuned and I notice it when some counters fall flat.
The datacrons make a huge difference so it could be helpful to watch current GAC vids to see what is working against them.
The beauty of GAC is that no matter our skill level or mods - we will eventually sink to (or rise to) equilibrium - and then most of matches will be coin flips.
The important part is to keep playing and qualifying for those crystal rewards.
What turned you off TW? Datacrons? Omicrons? Guild participation?
It is national to prefer some game modes over others- but your account really wants you to play them all to keep grinding those mats.
I recommend reading a good Star Wars book or researching a movie (or the rebels season 2 finale) to get you back into that sweet Star Wars groove- this game is just the gravy on top of that.