Captain America is the peak of mankind. He is the epitome of the perfect human being , able to go for day's on end without tiring a master tactician and a superb combatant.
Deathstroke on the other hand is all this and more, his brain works at 95% whereas normal humans only use 5-15% at best. He has instantaneous reflexes (allowing him to tag the flash) , a degree of super-speed ( he caught up to impulse) and is immortal .
Deathstroke , to put it simply. Is way out of cap's league.
Cap is merely the epitome of human perfection whereas Slade is superhuman. Cap doesn't tire, but Deathstroke won't end up winded either and he has an insane healing factor. Deathstroke takes this one. Give Cap his shield to make this a semi-even match
Cap. Anybody who voted against him is unpatriotic Just kidding. DS beats the s**t out of him the same way he should beat any non-meta when PIS ain't on.
Cap with shield? Cap takes this. I'm sorry, but I'm sticking with Cap on this one. You see, Cap's focus and skills allow him the same style of timing that can let him take on people MUCH stronger than he is. If you read some more Cap, he's actually a lot better than a lot of you seem to credit him. I have a feeling that Cap would take this one, but not easily.
Steve Rogers is a lot of things.
He is at the peak of human perfection.
He is a profecient combatant.
He has gone through that whole super-soldier serum deal.
However, he is simply NOT on the level required to go against Deathstroke (and win).
Deathstroke beats Cap like a Mexican birthday kid with a tire-iron swinging at a Pinata!