I was waiting until the tech finished his job of correcting the condensate line repair until I saw the final repair and here are my observations.
I "think" you may need some pitch (up toward the roof) on the vertical vent pipe piece…….. This may be a photo "illusion" but it appears there is no or negative pitch.
I suggest installing an overflow shut off switch on the condensate ****** so the AC shuts off if line gets clogged……… Remove the glove ASAP!
Hit that pan at the notched pan with some RTV.