The main reason for the overheating part is due to the fact that the hot air is getting trapped in the cooler! It doesn't matter even if you've perfectly aligned the intake and outtake fans to both of those holes ^{[air moves a lot slower when there's an empty space between them]}.

Note: I haven't mined in a very long time, so make sure to do more research on what I'm about to suggest.

• In theory, you should be able to detach the PSU ^{[e.g. like how Bitmain did for "S17/S17 Pro"]} and install it outside with some kind of bracket, then make sure there's no empty space between the fans and the holes.
  - BTW, I don't think using a shroud to connect the fans to the ducting parts would be enough ^{[most of the air would still pass through]}. Try to extend the isolated ducting ^{[e.g. it should cover everything like in this picture]}.