Just like there are some Na solo fans that hate Ya so much & bash her even though she is a good and kind-hearted person
I feel bad for both Na & Ya but it's obvious that they don't consider those people as their fans so neither will I~
I'm 100% sure that Aew loves him and has had nothing but good things to say about his personality and ability. Da has worked with him 3 times I believe so yeah, it sounds like she does like to use him in lakorns from time to time. Anne had no complaints about Na's role as Dawin & called him perfect, which he was because he executed his role very well (just like Ya did as well).