How do yall not let the rage consume you?

I've felt rancor and bitterness towards most of my surroundings for all of recent memory and have now realized that it's starting to affect my relationship (im growing impatient, ready to fly off the handle, a little defensive) and i feel like im in some way broken or "unfit" for a relationship. Very important to mention that i forgot to take my meds for an extended period and now they are virtuslly useless bbecause im a dimwit and am unable to properly remind myself of my fairly important emotional stability pills; This lack of pharmaceutical support (all a byproduct of my own actions) i think also plays a very big role in my current situation.

How do i not lash out or ruin my relationship with my partner because of my general unhappiness and, for lack of a better term, hate for and towards everyone else around me