enough of romance I want actions UGH LIKE COOL AWESOME COLL MC DUDE action and no harem st...

I'm not sure if there are many, that have completely zero romance, normally people form connections and it develops over time, but I can give you some with a minuscule amount of romance, that is more of a side note and bearly there. I know, most of them are popular enough that you've probably already read it, but who knows ;)

completed:
https://www.mangago.zone/read-manga/the_legend_of_sun_knight/
https://www.mangago.zone/read-manga/solo_leveling/
https://www.mangago.zone/read-manga/itsuwaribito_utsuho/
https://www.mangago.zone/read-manga/assassination_classroom/

and from in progress ones, for sure you must read Eleceed!
https://www.mangago.zone/read-manga/eleceed/
there's also official eng on WebToon app

https://www.mangago.zone/read-manga/kagurabachi/ (shounen manga; it's PEAK fucking MANGA, fights are ACTUAL CINEMA, the core conflict is human vs. human - no dumbass aliens or demons or monsters or someshit, ZERO fan service and ZERO OVERSEXUALIZED female OR male characters, later chapters get a bit bromancey as well, but NO ROMANCE AT ALL SO FAR)
https://www.mangago.zone/read-manga/gokurakugai/ (shounen manga)
https://www.mangago.zone/read-manga/windbreaker/ (shounen manga)
https://www.mangago.zone/read-manga/kaiju_no_8/ (shounen manga)
https://www.mangago.zone/read-manga/gachiakuta/ (shounen manga)
https://www.mangago.zone/read-manga/chainsaw_man/ (shounen manga)

https://www.mangago.zone/read-manga/the_executioner_lee_jehwan/

https://www.mangago.zone/read-manga/heaven_can_t_live_an_ordinary_life/

https://www.mangago.zone/read-manga/the_reincarnated_assassin_is_a_genius_swordsman/

https://www.mangago.zone/read-manga/kaiju_no_8/

https://www.mangago.zone/read-manga/trash_of_the_count_s_family/

my babygirl han maru
https://www.mangago.zone/read-manga/special_civil_servant/

This one is sooo good, no fanservice, no harem, no romance, but there’s still cool girl characters, it’s historical too https://www.mangago.zone/read-manga/i_m_not_that_kind_of_talent/

TAH K YOU ALL OF I GUYS i needed these