Re: People who are never uke
Be wary of confirmation bias. Earlier I mentioned that they might be bullies as one of two distinct possibilities, but you seem to have latched onto that one. Consider the other possibility: that these individuals are doing something that they think is worth practicing, and that they are looking for a very specific approach, condition of body alignment, or very precise control by nage. It may be the case that practicing with them will drastically improve your technical abilities. Try talking with them about it. Be curious, rather than frustrated or angry when you approach them.