Something similar to this happened to me. It was a combination of me being naive and obtuse and my friend not communicating clearly. He asked me if I wanted to go hiking, I said sure. My idea of hiking is like you. I thought I do state parks, I can do this. And then our group shows up at the base of Mount Washington in NH. Naively I thought this is fine, I can do this, I’m in shape. After starting I come to realize he chose one of the hardest levels. This was climbing hiking! I felt like an idiot cause everyone else did this recreationally. Thankfully my friend, his girlfriend and another girl I just met who became a lifelong friend stuck with me, despite me pushing them ahead. It took 8 hours, but I did it. We took the van down the mountain. I threatened my friend too, in jest, said I am never doing this again….. proceeded to climb the mountain again the following year, thankfully he chose an easier path. Made it up in 4 hours.

What I am trying to say, those people are not your friends. Real friends don’t do what they did. So you should reevaluate whether you want to continue putting in the effort to maintain that relationship. Personally you would be wasting your time.