OK, so the first post was about the tune needing a crash on 4 of the measure just before a change, and drummer can't get it, keeps hitting on the 1 of the next bar. Could be two things happening here: 1) he doesn't really KNOW when the change is so he can't anticipate it by one beat (that's losing the song form) or 2) He knows very well when the change is happening, but he can't reliably place his hit on 4 (that's about losing track of the beats within a single measure).
The way for him to practice this, of course, would be to come up to that hit and say to himself "1-2-3-BAM!" (We'll leave aside motivation for now.) If he's not clear where the change is, then he would need to go "1 - - - 2 - - - 3 - - - 4 - - - 5 - - - 6 - - - 7 - - - 8-2-3-BAM!" to place himself in the right place in the song form AND in the right place in the bar. Other than real exotic rhythmic styles, a few times through with the crutches and any competent drummer (or other musician) won't need to use the crutches to be in the right place at the right time.
Why can't he do this? Well, he's probably never been taught how to practice, for one. Getting yourself in the right place at the right time is something that has to be practiced, and you have to know HOW to practice it. I'd bet there's some oppositional-defiance there, too, some of "well, I don't need to know all that fancy-pants theory stuff", which of course means it's going to be very difficult to bring him along.
I'm betting his problem is he doesn't know how to fish and doesn't want to learn.
I see a lot of the oppositional-defiant stuff with adult players who don't have a tool they need to play something correctly but don't want to acquire the tool, either.