I am going to detail a specific situation but I think this is a common problem.

I am taking a sailing course. We need to be two people on a boat and as others were parents/children crews, I didn't have a choice for my crewmate. So I am sailing with this guy who could be my father, and we have the same level and experience approximately. Sometimes, I make an "error" or I am a bit clumsy, I know it and while I am correcting it he says "You have to do this, now it is not good". So I tell him that I know, as I am doing it. At the end of a demanding session, he told me, apparently frustrated, "You know, it's not bad to get advices to improve". I precise that when I try to suggest him improvements, either he ignores them or he mumbles when looking at what he could do better. He also is very extrovert and a regular of the club, so he always keeps talking while I am preparing the boat, avoiding to help me with the strenuous parts, even though is perfectly able to.

I am very uncomfortable with this situation, so any advice is welcome.