When I get cheated I always get mad at the guy she cheats with and I dont know why?

i get cheated several times in my life and i never really get mad at the woman even sometimes continue the relationship sometimes (esp when i was young i was even begging to continue to this relationship) meanwhile i always scream/attack the guy she's with. i had lots of fist fights in my 20s because of it. i think i literally have every guy is your rival/competitor mindset and its your fault if your girls cheat because you're not enough and there's men that better than you etc. i still feel like that but i feel guilty for it

When I get cheated I always get mad at the guy she cheats with and I dont know why?
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