Curious what people think the forced drama is? I think it's pretty clear that events of the characters' early lives lead them to where they are now.
Kanade was socially and emotionally humiliated as a child by a pretty girl and now she has deep personal insecurities and an unhealthy obsession with pretty girls as people who must act "better than regular people."
Nanaki has been a popular, spoiled, heteronormative person her whole life. She has no frame of reference for gay feelings, and remember how blunt and tactless ALL the other characters call her out for being? "Fujishiro is basically a guy" said Kanade, in reference to the cliched trope that men can't have emotional intelligence. Her loud emotional responses are not at all out of place for her character.
PS if you ever knew someone who had a tough coming out, I don't think you would be surprised by the avoidance tactics and emotional outbursts. When I came out at 17, I became so depressed I nearly dropped out of highschool.
If you feel the drama is just to emphasized, remember this is a drawn medium with little to no narration, it has to rely on exaggeration to get the point across sometimes.