AIO gf is playing games with a guy she met on hinge?

So when my gf and I first met and went on our first couple of dates, there was another guy that she also went on a date with (since we weren't exclusive yet).

Fast forward to about 6 months in, we broke up and she decided to immediately message him and low-key flirted with him. When we got back together and we talked about it, she said it was just to use him for a ride to and from the airport.

After that matter was settled, she also started following him again a couple months later, and when I asked her not to, she said "I'm not gonna unfollow him again". I found out she was also playing games with him, when I asked her to stop, she called me controlling and insecure. To not worry, they're just friends, that he has a gf, and that I'm overreacting.

I mentioned i wasn't comfortable with it so many times and she eventually cracked and agreed not to play with him.

Now it's a few months later after that. She keeps mentioning friends that she has been playing games with, and I was fine with it because she had mentioned some guys from work wanted to play, and that's fine. But I just got off the phone with her and she mentioned that the guy was the hinge date guy. I just told her it's fine, and told her to do whatever, because I'm tired of explaining my feelings to her. She kept going with the whole 'he has a gf' thing.

Am I overreacting to feel hurt by this? I don't wanna be controlling, but she literally went on a date with this man while also seeing me, while I asked her to be exclusive but she still went on the date with him back then. She liked his profile first, so she at the bare minimum finds him attractive right?