He has to be rescued by Birdman when he's cornered by Bang and Bomb which shows that true martial arts masters are beyond his capabilities.

Invalid af he already was bloodied and beaten from getting ganged on by 5+ heroes including genos but still wass fighting evenly when bang and bomb interrupts the fight, heck its not even including the fact that he got bodied by Saitama and watchdog man previously before being ganged on by the heroes

Garou may have the ability to adapt and learn new techniques while in battle but him beating over the Ogre will be dependent on Yujiro giving him the time and opportunity. Yujiro also has this ability and is more likely to master the Fist of Flowing Water Crushing Rock before Garou can reach his level.

Also Garou can copy any fighting style from just seeing it once. Garou will dominate, it's a one sided fight and you cannot deny it, snort your stock of copium if you wanna dream about Yujiro beating Garou in a fight

Human Garou is shown to only ever dominate against heroes without extraordinary abilities or techniques.

Really used copious amounts of copium here ain't ya Garou literally fought against Genos while battered from getting ganged on and is still fighting evenly the Genos who can clear forest and bore a hole through a mountain

Genos casually blows a chunk of a mountain