Any good short complicated yaoi mangas???

You mean completed? I'm gonna assume you meant that and so here's some short ones :))
https://www.mangago.me/read-manga/tell_me_you_can_hear_it/
https://www.mangago.me/read-manga/the_man_in_the_mirror/
https://www.mangago.me/read-manga/bokura_no_tsuzuki/
https://www.mangago.me/read-manga/cinema_next_door/
https://www.mangago.me/read-manga/hatsukoi_kazuki_rai/
https://www.mangago.me/read-manga/kamisama_to_toberanai_tsukai/
https://www.mangago.me/read-manga/akai_ito_no_shikkou_yuuyo/
https://www.mangago.me/read-manga/suki_no_onshoku_wa_kikanaide/
Also you can check my list, most of them are mangas so they're short and you can look for the completed ones if you'd like~
https://www.mangago.me/home/mangalist/767246/?filter=&page=1

https://www.mangago.me/home/mangalist/1280597/

https://www.mangago.me/read-manga/moretones/

Yes omg i misspelled it so hard thankss btw

Npnp ^ ^ glad to help~