Oh I totally disagree with you @blake_smith, you can't just throw a rug over bad work and call it a day. That seam in a doorway is a tripping hazard waiting to happen (especially if you've got kids or elderly folks around). And the shifting padding is a sign they didn't take the time to do it right, which means it'll keep getting worse over time. You pay for new carpet expecting it to look new, not like a DIY job someone rushed through. Maybe you're okay with settling for sloppy work, but most people aren't paying premium prices for something they have to fix themselves. It's not about "freaking out," it's about wanting what you paid for.

My buddy's truck had this dent on the rear quarter panel from a shopping cart, maybe the size of a baseball, and the shop quoted him $900 for a whole new panel. I told him to bring it over and we spent maybe two hours with my cheap Harbor Freight stud welder and a slide hammer. It came out good enough that you can't even notice it unless you're really looking, and that was after a rattle can of clear coat to seal the tiny pinholes. Stuff like that is why I'll NEVER bother with a shop for anything that doesn't need a new frame or engine work.