I haven't watched TBOY or DY,can I still enjoy this drama as it is or do I have to watch the other two?
This is set way before TBOY, but a little after DY. While there are some characters you meet in the other dramas, most of them are "new" or just a supporting/guest role in the other shows. So you can watch this easily without really knowing anything.
Before watching BLOOD RIVER, do I need to watch another drama to get into this one?
this takes place after Dashing Youth. The Blood of Youth takes place in the future after this. most of the TBOY leads are still children in this timeline.
they love to make men the buffoon, the useless and the pervert they never divert from it, tiring...
Similar to how they make mother-in-laws wicked who bully their daughter-in-laws, jealous women who get between the leads and cause all sorts of drama, evil grandmothers who use the youngsters as pawns etc. There are plenty of common tropes everywhere for both genders.