I know it seems this way to you, but the reality is we’re really not “happy out of nowhere” or “angry out of nowhere,” etc. There’s always something that leads up to it.
Now, you may well have practiced yourself into a habit of making yourself angry in this type of game and you may have practiced yourself so well into your habit that it seems to you as if it’s out of nowhere. But there’s a process to all of our emotions. So, you can start to notice for your early subtle stages of your process (and you do have them), noticing what you use for your reason to make yourself angry and then find fields to address that.
If it’s all a big mystery to you and you don’t think you’re able to do the kind of noticing I’m recommending, then you can use fields like New Release: Emotional Mastering Protocol (to help you feel your emotions more precisely, so that you can notice your early subtle stages of your angering) or New Audio Field: Conceptual Realizations (to better comprehend your angering process, especially in relationship with your game).
Or you could use something like My personal emotional and mental supporter to guide you through that noticing.