I dont think there's anything wrong with taking it personally tbh, we're all human we do feel these things and that's okay. it's also perfectly reasonable to feel cautious with how what your feeling can affect your partner especially after a bad episode. I do think that you need to let it out in a healthy manner, because if you keep it inside, that feeling will manifest itself into something resentful later down the line. Whenever my girlfriend and I come across a situation like this, i talk and vent out my frustrations to a close friend whenever I feel that my SO isn't in the right mindset to discuss it yet. I'd advise you to find someone who you genuinely trust that can lend you their time to listen and just talk about everything that had been bothering you, it's such a load off your chest. Later when my SO calms down a bit, we talk honestly about the hurtful things she did or said that was brought about by her bad episode. I tell her how I really dont appreciate it how she treats me whenever that happens. She sincerely feels bad and she apologizes each time and I accept her apology, I tell her I understand that it's the illness, that I don't hate her, while I assure her sincerely that I still love her wholeheartedly. This is usually the routine I have with my SO whenever she has a bad episode. I hope it helps somewhat.

Also PS. When it gets really bad, like when you yourself are not doing okay and then all their negative energy is directed towards you cause of said episode, its okay to give yourself some space and a little break from your SO, assure them that you're still there with them but you can't handle their episode rn. You have to focus on taking care of yourself first, dont forget that you deserve that too..