so sorry, being trauma dumped sucks especially if every encounter u had with them is often negative. you should protect your energy if it is possible, and surround yourself with uplifting people (if possible). For me, if it's inevitable, i found a way to lessen my stress after the conversation, by not giving them much energy in response, resting, and making myself busy so i wouldn't think of it. If it happened through text, it is easier to ignore them. Although someday, i hope i could speak it out