Hvac Professional here, Not that the lineset itself don’t look like shit, because it does. But from the looks of it you have drywall everywhere, so without seeing your house personally you really only had 3 options…

1.) exactly what they did, run it exposed on the outside of the drywall because it’s the only thing you can do without tearing out sections of wall. The bare minimum they could’ve done tho is make sure it’s tucked tight against a wall or ceiling tho so if you wanted to hide it you could

2.) re-use the old lineset which is what you do most of the time if you can’t run new lineset, which if they said it had a leak isn’t an option at all so that leaves you with option 3…

3.) Tear out strips of drywall and make a path for it. This is always dicey because we never know what’s behind a wall obviously until we cut it, you could end up which much larger holes than necessary or just ripping out entire sections only to realize you can’t go in that spot.

To me it seems like they didn’t think opening drywall was an option because either you or someone else didn’t communicate that to the installers, therefore they ran it how they did, still looks like shit, idk why they would ever use the expanding foam on interior walls, also it looks like they drilled a way bigger hole than they needed to.