yellow, green and then the one 1 day after the heist, series is a mess

Sounds more like you don't have the mental capacity to understand what's going on. The whole point of the show is to watch it in whatever order you want to get a difference perspective on the reasons behind all of the events that took place (there are over 40,000 combinations of ways to watch this.) And incidentally, there are two episodes that take place after the heist.

It doesn't, it's a gimmick. Watch them in chronological order.