One of two things regarding your post:
1. You created this to show off games where you just play bad on purpose and resign. BTW, this has been done to death.
2. Youre serious. The answer to your problem. All you play is speed chess, and move too fast. Play slower or dont expect to improve.
"It's just pieces and a board, this shouldn't be hard to master."
If you believe chess is just a board and pieces then it should be easy to master. If thats so, then why are there so few GM's? Why isnt everyone a GM? or at least a IM? NM? or even Expert?
I can't win. I can't think three moves ahead, those are all hypotheticals predicated on certain things happening.
It's just pieces and a board, this shouldn't be hard to master.