Zoro is the second strongest of the crew and he gets appropriate shine for that, but his raw strength feats and durability are not on the same level as Luffy's.
Yeah taking Luffy's damage and nearly dying is Zoro's top durability feat, because Luffy takes so much more damage and fatigue than the others as a standard operating procedure. Look at what Luffy survived from from Impel down to the end of pre-ts and still fought Jinbe as his wounds were opening up.
Zoro lifts his weights while Luffy runs around and fights with a giant gold ball.
Zoro lifts a building while Luffy punches through tremendous amounts of bedrock.
He cuts a chimney while Luffy splits a city in W7.
Zoro faints to a shoulder wound and a stomachache, while Luffy carries on fighting after being drugged and having his stomach drilled through and being beaten for hours.
Again Zoro's feats are impressive, but you need to stop downplaying his captain.