Diesel Bombers - I think my truck hates me

As it says lol so I bought my 01 cummins end of February and the tcase was leaking so did a full reseal and while that was I painted the drive shafts had to rebuild the front shaft then the rear speaker started crackling sounded like a dam mouse was in the door when the radio was off then the pass tweeter started doing the same thing then the whole passenger side went dead no sound at all so I went out and bought four new door speakers and a amp and when I was wiring it in I noticed the whole passenger side floor was wet so much the carpet but the foam was soaked so I found where it was coming from rear window top corner on passenger side and the thing is its not a pos it's in beautiful codition except for the box on driver side has to rust spots over wheel well which I already bought a Arizona box for it too :argh: is it common for the rear window to leak on these trucks I know I'm prolly making a big deal out of small stuff but it kinda pisses you off when your still paying on it