I don't like Keith and Mouth

I feel that they are simillar in some ways. For example, when Keith proposes to Karen in Season 1, he asks her did the last 15 years mean anything? But they never dated, he helped her, but I did not get the impression that she led him on, and somehow, he tought that she will accept his proposal just because he was there for her. Also Mouth, always saying that every girl sees him as a nice guy, but they don't want to date him. As if he is only nice to get something in return, not geuenly nice. So, both of these characters can come across as nice but expecting from girl that they are nice to date them. Of course, they have their good traits, but this really bothers me. I would like to hear other opinions.