Tips for sealing this door gap between my garage and house? There's already weather stripping but the door frame is just warped into the wall. I know I need to pull the trim off and shim it but it's a pain in the ass and will fuck up the trim

Just add thicker weather thing

slice up an EVA foam mat and make some double sided duct tape strips

Just get one of those brush-type weather stripping add-ons that installs on the face of the door at the bottom of the door like picrel. Probably put it on the inside face. There's flexible rubber ones, too.

>>2922472 (OP)
install a door sweep. weather strips are not supposed to be used for the underside of doors except for storm doors.

>>2922472 (OP)
Is that a gap between the bottom of the door and the floor/threshold, or is the picture rotated and it's a gap between the door and the jamb?

If it's a gap at the bottom, install a sweep.
If it's a gap at the jamb, install a seal on the jamb flush with the face of the door.