I feel Microsoft should just make it to where we can buy or remove achievements I've had at...

Yeah, had the same problem, but I've noticed, that Microsoft had not (yet?) removed SA from other stores. So I've changed Xbox location (Settings-System-Location) to Russia and downloaded the same GTA:SA again (it's still fully in English, but it's a Rockstar
game, so there should not be any issues in any other region as well). Now I have two copies of the same game, but only one of them currently works. They both share same save files and achievements, so no problems on that side. Looks like I'll never shut down
my Xbox nor close that game until I 100% it, in case Microsoft decides to remove that copy too. And while that can be just a temporary bug, it makes me wonder: how can I trust Microsoft store, while they can just remove something I've paid for and make it
look like I've newer owned it?

I've been playing multiplayer and single player and I can't see any place in the game where I can buy cars. I feel dumb because this should be obvious.

You know, since we get less content they should just remove those annoying ads at least. Would make me feel just a bit better about it.

I just want it gone for all the times it screws up. I've had matches where i insta lock on enemies and just clean up and i've had matches where i get anti-auto aim where it will refuse to lock on players. The whole thing makes me a sniperfrog suspicious
and i wish they just removed it entire so there was no guessing.

No lag compensation and no auto aim please.

I agree, that a real solution would be the right thing to do. I have one achievement that did not unlock, and it is completely obvious it should have. I even had a Microsoft representative say that the achievement should have popped, yet they can do nothing
about it. That doesn't make sense. There needs to be some way to manually pop achievements for people who deserve them. We went through the phases, we submitted a survey. Verify our achievement(s) and unlock it(them) for us.