I had to move the strike plate up a little too. Assumed that the OP had already checked and done all the small/easy fixes:)
Then I looked at the door frame from inside and saw the light - no, I was sober, it just was the crack around door frame that the trim didn't cover. Took some caulk to it.
Then added an extra weather strip on the screen door where it was TOO much of the gap.
Then - the drawers held together with staples like those you use on paper, then - the shower head screws barely holding in 1/8" plywood as if anchors or backing has not been invented yet. Etc etc, ad infinitum.
Don't get me started...