Yeah the keyboard controls were awful, apparently it was because they wanted the game to have a console port using a gamepad.
Thing is I bet the people who played it are right too, I just never managed to bring myself to play more than a few hours of the game before getting frustrated. Bad controls + 90s point-and-click-puzzle-design + early 3d graphics is not a good recipe.
Full Throttle was criticized for its dumbed-down point-and-click (basic only 3 actions + using items, instead of the usual verbs), but that was the sweetspot for my early-teens mind. Can never get enough funny responses of using the lick action.
I also remember the criticism of Full Throttle, but it always rang hollow to me: a game is not just the puzzles, and also some people complained about the action sequences, but for me they were welcome (even if too easy). Everything about the game is golden: the setting about bikers (how cool is that?), the 2D pixel animation, the amazing voice acting and the opening by the Gone Jackals. I fell in love with the game back then, and I still like it on replays.
LucasArts then made the same mistake with Escape From Monkey Island, because they were targetting the PlayStation 2