“Why am I replying to him, oh, he’s replying to me…”

Eh, I agree with the OP, but Memento isn’t comparable to the sort of thing they’re complaining about. Memento is a story told backwards to mess with your perception of the story. The “flashbacks” (flashforwards) are a lazy trope to either try to suck you into the story by giving you the cool part near the climax as the front of the movie or some emotional manipulation crap. The “I bet you’re wondering how I got here” variant is the absolute worst tho…