AITAH for breaking up with my boyfriend for the way he runs?

for context we have been having relationship problems, he doesn’t take my feelings into account and i have tried to communicate this with him but he simply won’t listen to me. The other day we had a conversation regarding misogyny within his workplace that i have noticed. the debate over the term “run like a woman” was started by a male coworker of his, resulting in an argument between by boyfriend and his female coworker. She insisted that the phrase was misogynistic while he insisted that it is simply a biological difference between men and women that makes men more capable of running fast and efficiently. this argument spiralled and i was so sick of hearing about it i asked to race him. i’m not exactly a fast runner, but neither is he so i honestly had no idea what would happen or why i offered to race him. we set a start and finish line and decided we would time each other seperately for most accurate results. i went first, and he recorded and timed my run. i crossed the yard in 8 seconds. it was his turn and he crouched down at the starting line, and when i said “go” and he took off running his arms never left his side. he let them hang to his side and they bounced while he ran, resulting in him looking like a flapping bird. i was so disgusted with what i was seeing i could hardly focus on his time. he finished in just under 8 seconds, beating me, but i did not care in the slightest. i rewatched the video of him running over and over again convinced he couldn’t seriously just run like that, his arms hanging down by his side bouncing freely with each stride, i ticked me out so bad. i was already debating breaking up with him due to his misogynistic attitude but after seeing him run it was the final straw. i went home that evening and called him saying our personal beliefs didn’t line up and i couldn’t see the relationship progressing but deep down i know it was the way he ran that sealed the deal for me.