am I the only one who finds the AI to have ridiculous detection abilities?
Nope. AI behavior can range from really dumb to hyper aware. If you're prone and move slowly, you can almost bump right into them sometimes. However, fire off a shot from anywhere and quickly expect a hail of return fire. There are mods that make them act more realistically and the difficulty settings you choose will change how smart they are, how quick and accurate they target you as well.
My biggest problem with playing with AI is that after a while they become very predictable. You know that they will shoot back for a bit, then get up, run a few yards, look around, go prone and fire again. You get used to waiting for them to stand there immobile for a sec so you can pick them off.
That's why I try to only play PvP.
As far as those new to the game, *****ing about the controls ect and how different it is. Well..... it's way different than anything else you have ever played, a fast twitch style of play doesn't work well. You can't just expect to succeed at it right away. It takes a while to get used to it, movement speeds, the weapons, ballistics, ranges and on and on. I found the campaigns and bootcamps to be minimally useful, I think the armory and some of the challenges are far better for improving weapon skills and learning how the game plays. They are like mini SP missions. Particularly the assassination one, stealing a vehicle and being hunted down. Those are the best.
Also for the new guys, remember that most of the weapons with optics, you can switch between it and iron sights. I bound a mouse button for that, it'll improve your CQB skills considerably.