Your biggest issue is that you're trying to make better decisions when you should instead be making better responses. It sounds awkward, but it's rather simple: according to game theory, practically everything is a game. In these games, you don't make decisions at all. They're called responses instead. That's because everything is dynamic. When you're making a decision, you're asking, "What is the next step right now?" which is shortsighted. When you're responding, you're thinking, "How does this impact my position, and could it come back to bite me?" This is a seemingly irrelevant shift that thoroughly changes how you think. Responding beats deciding every time.