Grandma Called Grandpa an Asshole

My grandma just got really mad at my gpa bc he couldn’t get up from the chair fast enough to open the door for her (she couldn’t find the key to the front door and my gpa has bad knees making it hard for him to get up quickly or at a normal speed). She got in and they started arguing and my gma called him an asshole. I didn’t have an anxiety attack bc of this luckily, but it made me have a flashback. My abusive exs used to call me names like asshole, bitch, slut, whore, cunt, etc. It makes me feel terrible, but idk why it made me feel terrible when my grandma said it to my grandpa. They weren’t even talking to me. I just don’t know anymore.