You mean Mako gameplay, right? If so, I totally agree with you. Must be hardest vehicle on gaming history to guide. It would be normal but why in the name of hell it has to reset controls if you scan with right stick
I got used to the controls after awhile, although I agree they're very poor.
What really grinds my gears is combat in the Mako. Enemies will snipe at you from what essentially amounts to beyond visual range (even if you try to use the turret "zoom"). If they're shooting rockets or plasma cannons, they will hit you every single time; for the player, trying to retaliate at the same range means squinting to look for tiny muzzle flashes, guessing an approximate position, praying, and pulling the trigger. Moreover, you can't utilize any high-ground, because the Mako turret has no z-axis movement, just side-to-side.
Close quarters combat is out of the question, as well. You'll get torn to shreds, and the control setup rules out effective strafing (turn the turret, and the whole damn vehicle turns accordingly

). So in the end, the best way to engage in vehicular combat is to park the Mako at medium range, snipe at targets, and use the jumpjets whenever a rocket or plasma shell is about to hit you. Once I perfected that technique, fighting in the Mako became easy; I never had to worry about losing shields again. But honestly, what's the fun in that? Park, zoom, shoot, hop, repeat. How inane.
Oh, and Thresher Maws. They could actually be fun if they didn't have a chance of insta-gibbing you.
Really, its the Mako that made my first campaign of Mass Effect so frustrating, which ultimately meant I never bothered with more than a handful of side-quests (since most of them require you to tramp about in the damn thing). It's a bad mechanic in that sense. Assassin's Creed, at least, doesn't force you to put up with its own form of freeform flapdoodle--riding horses through the Kingdom--except when you're traveling to the cities for the first time.
But again, now that I got the hang of Mako combat, tedious as it is, this second time through the campaign is wonderful and extremely enjoyable. It also helps that I'm not playing the soldier class, a true snoozer.