This show can't write romantic relationships worth a damn.
Those two grown ass women in the lesbian relationship are written like they are 13 year old middle school girls in a cheesy after-school special.
The Supergirl/Mon-El thing has been written horribly. The show is totally ignoring that these actors have zero chemistry and that nothing from the way Melissa Benoist has played Kara has indicated she had any romantic interest in Mon-El at all but one chat with her confused lesbian sister about how maybe Kara told Mon-El she wasn't interested was because she was secretly in love with him and we have an instant relationship.
And Mr. Mxyzptlk is supposed to look like an old bald dwarf...not like some dude from Barcelona on a semester abroad.