Just a thought regarding the donk in example 3. I've noticed that there is a real urgency to get all in with bad players whenever possible; but OOP with a poor hand like KQo and a villain who never folds - even vs an ultra-donk surely circumspection is preferable to a head-down charge. I think you can call here, and you can check/fold the flop if you whiff - the value comes from when you do hit on the flop, and you value-bet the tits off the guy.

It's a long term game and that doesn't change just because it's you and idiot boy heads up.