B.; it sounds like he enjoys being with you more than others, it may not be structure he dislikes, he might just enjoy your company , he may of had a thought too that you would be there with him instead he was thrown into a place with people he did not know, ? i dont know, but i dont think i would make something he loves into something he hates, try doing a play time with him but teach him yourself water safety? or ask instructor if you can join him in the water? he might like to have his own little cheer session not behind glass, maybe he could not see you , ? they do need to learn respect of the water, and how it can be dangerous for him but if he listens while around water he can have lots of fun, try different things, ask him what he likes, its ok to keep him going, and its ok to teach him yourself, but he does need to be taught, he might just want to be with you ,and it could be hard for him to realize he had fun, we would take our kids to disney and have a wonderful day no arguments, they did wonderful but i always had a son, who always seemed to say at the end of the day i did not have fun, we were crushed, so it may not be that he did not have fun , but his statement could be just of i dont want it to end, maybe if he had free time after the lesson? keep going and just have fun, D. s