Mitsubishi has had some quality issues with their cars in the past.... just look at the JD Power surveys from 4 years ago....... but it looks like you have had some bad luck.
FWIW pretty much everyone really hates the first ding or blemish their cars get. It's part of new car ownership.
The first new car (Jeep) I bought got the quarter panel caved in when it was on the dealer lot..... after I had bought it, but before I took delivery. So my brand new car came equipped with slightly mismatched paint, sloppy seam-welds and a mising rub-strip... even before I drove it.
Mind you, 2 years later I drowned it in a mud and sand-filled river.......
BTW this kind of rant really belongs in "Stress Relief' as it is not related to the vintage Muscle Cars that usually occupy this subforum.