My boyfriend left me alone at a restaurant to play chess in the bathroom, AIO?

Hey guys, Short-term lurker here.

My boyfriend (26) and I (22F) went out to a a steakhouse, we were having a great time, vibes were good. He paid the bill, got up to use the restroom, and I stayed at the table thinking he’d be back in a few minutes.

Fast forward… 10 minutes go by. I’m making small talk with the staff, sipping my water, awkwardly scrolling on my phone. The texts are attached (he didn't reply after)🤣

Another 10 minutes pass. The place is dim and maze-like, and I couldn’t figure out where the men’s restroom was. I was literally going to go yell his name there. What if something was wrong? I asked a waitress, and she pointed me toward the women’s side, which made me too awkward to ask again for the men's washrooms (different room), like what am I gonna do, wipe the ass of this 6’4, 200-pound man?

So I left. I figured I’d rather wait at the bus stop than sit there alone looking like I got stood up. He had the car keys anyway.

Six ish minutes later, he calls me asking where I am. I told him I left. He gets annoyed and says I overreacted he was in the bathroom playing a chess match on his phone. A chess match. “It was a good game, I didn’t think you’d care since dinner was done.”

So yeah. Now I’m wondering if I totally overreacted or if that was actually a red flag and inconsiderate. Thoughts?