> I doubt any human would solve them for 3 minutes straight

Cognitive overload. There's days I'm just straight up tired and don't realize it until I'm at least one "please try again", page refresh, and endless traffic light game later that I'm probably in the tarpit and wonder why.

The weird thing is that I don't KNOW why. I use good ol' consumer Chrome, good ol' consumer MacOS, a consumer ISP, and my IP isn't in any kind of reputational blacklists that I'm aware of.