For reference, I didn't like Crash Into Me, Sign, Love Is An Illusion
Viewfinder, and Behind The desk
The only yaoi manhwas I genuinely enjoyed were All About Lust, Eunsuk & Jung-gu, and Playtime with Hakdo. Dark Heaven was okay too.
https://www.mangago.zone/read-manga/hollow_lovers/ this isnt yaoi but i feel like u would definitely love this a lot based on what you said
https://www.mangago.zone/read-manga/the_beast_must_die/
https://www.mangago.zone/read-manga/king_s_maker/
https://www.mangago.zone/read-manga/wolf_in_the_house/
https://www.mangago.zone/read-manga/lover_boy_lezhin/
https://www.mangago.zone/read-manga/hotel_phryne/
https://www.mangago.zone/read-manga/a_proxy_painter/
Im ngl its way easier to find manga or shounen ai with good plot and characterisation than it is to find manhwa imo.
Anyway i have a list you can look through too https://www.mangago.zone/home/mangalist/1155086/
https://www.mangago.zone/read-manga/mr_100_perfect/
https://www.mangago.zone/read-manga/raising_a_bat/
https://www.mangago.zone/read-manga/walk_on_water/
https://www.mangago.zone/read-manga/momentum_park_ji_yeon/
https://www.mangago.zone/read-manga/wolf_in_the_house/
https://www.mangago.zone/read-manga/10_years_where_i_loved_you_the_most/
https://www.mangago.zone/read-manga/life_senjou_no_bokura/
https://www.mangago.zone/read-manga/for_your_love/
https://www.mangago.zone/read-manga/mother_s_spirit/
https://www.mangago.zone/read-manga/the_beast_must_die/
https://www.mangago.zone/read-manga/the_world_of_pieces/
https://www.mangago.zone/read-manga/black_mirror/
https://www.mangago.zone/read-manga/checkmate_1/
https://www.mangago.zone/read-manga/escape_into_oblivion/
https://www.mangago.zone/read-manga/swallow_gawee/
https://www.mangago.zone/read-manga/geu_kkeute_issneun_geos/
https://www.mangago.zone/read-manga/10_years_where_i_loved_you_the_most/
https://www.mangago.zone/read-manga/moritat/
https://www.mangago.zone/read-manga/hate_mate/
My theory is that the author just needs some money, so she made side stories without thinking of the quality. The side stories for the spin-off "The Form of Sympathy" are also terrible.