One of the reasons I like this game beyond the fact that it's very deep, is that it's not just the person across the table from you that you're facing off against. You are also your own opponent.
What do I mean by that? Simplistically, I don't think anyone would say that going on tilt won them a game. More seriously though, try to watch yourself for tunnel vision and make sure you take a step back to re-evaluate your priorities for a turn.
I hate to always use @Natetehaggresar as an example (sorry Nate!), but I do it because of the sincere respect I have for him. What makes him a great player and not just a good one is his consistent ability to do those latter things I mentioned. As much as @thediceabide and I joke about him being a Borg drone, he's human, gets salty, goes on tilt, and gets tunnel vision from time to time. But he also will say things out loud like: "I want to go kill your <x> because it was such a pain this last turn, but that's a bad idea. I'm going to think about what I HAVE to get done this turn, and how to set up for a next turn." Then he'll go quiet for a bit as he thinks and then proceed to win the game shortly thereafter.
I think that moment of self-awareness and stepping back can be a major hurdle in many folks' infinity development, and personal development as well. I know I struggle with it every game and in my day to day. I've found that a simple "escape valve" rule for myself helps. If I start going on tilt because of dice, bad decisions, whatever, I stop what I'm doing, even if it's in the middle of an opponent's order, put down my dice/tape measure, take a deep breath, and refocus. If it's my turn I'll take a few moments and maybe even voice my frustration just to get it out there: "UGGH that's the worst!" is something I've said many a time.
Anyway. You're not alone, @dataentity. We've all been there. I hope your next game goes better.