Who does your SO take it out on?

I recently broke it off with my SO. They have been on and off medicated, no therapy, generally deciding how they think their BP2 should be treated best which is by only taking an anxiety med.

I was going through our shared devices, accounts, emails, etc and trying to unravel it all and save all the pictures on thereof our kid to a couple saved drives so we could both have them. I was going through an email that we have shared through the years and found that in the sent folder of it for the past few ears every email sent was from him and was absolutely vile in nature. They varied to where they were sent, some were utility companies we received service through, eBay sellers, Google play customer service representatives, etc. And each one of them just were ore inflammatory than the other. They were filed with rage, slurs, accusatory statements, outright threats. I'm not surprised to find these. It's just tiring.

Well, over the ten years I've been with them their BP2 has gotten worse and worse. And through the whole thing it's been interesting to see who they take it all out on. To his family he has been nothing but very polite and helpful and caring to. His close friends get the same courtesy. But me, and everyone else who is a stranger to him gets absolute evil treatment. He can't go to Walmart and go grab a frozen pizza and then leave without thinking the old man in the power scooter gave him a dirty look, when the man clearly has cataracts thicker than a goofball and has no idea where he even is. He's ready to be at the fuck out of old men who can't walk because he is so on edge.

Why can they pick and choose who they want to absolutely abuse? If its so easy to pick and choose who you abuse, then it must be easy for them to just turn it on and off or hold it back.

Does yours pick and choose who gets to see their bipolar?