1. DD tanked an attack that surpasses Thanos power output (OB). So Thanos blasts are not doing much if anything.
2. DD has instant healing, so any damage done will be healed instantly and no progress by Thanos will be made.
3. DD can evolve on the fly to become more resistant as the battle progresses. That means less to no more damage done.
4. DD is vastly quicker and can blitz attack Thanos at times before he can respond.
5. DD is relentless and will chain an endless series of attacks in no time.
6. DD has sharp extensions and can cut, rip, and stab Thanos up something fierce.
7. DD is physically stronger than Thanos
1. You need to prove the OB surpasses Thanos' power output.
2. DD does not have instant healing. You need to prove it.
3. Another baseless claim.
4. Thanos has shields so nullified.
5. Thanos can teleport and use shields to toy with an unthinking brute.
6. Shields.
7. Prove it.
1. The OB vaporized a missile at half power (not destroyed or cracked but vaporized). Superman couldn't put a scratch on the missile using all of his might. That means half the power of the OB is magnitudes more powerful than Superman himself. And we all know Superman's feats.
2. I can post the scan of DD healing almost instantly from being cut about a quarter of the way through his torso. Narrative even explained that DD's wound healed instantly.
3. DD was shown to evolve on the fly several times in mid battle (not after he died). Thus comics support him having the ability to adapt on the fly.
4. Thanos won't be able to get his shields up in time all the time. Sometimes DD will blitz before he can react. Even if Thanos get his shields up then Thanos can't attack and will make no progress. Also DD can crumble Thanos shields after sufficient amount of attacking.
5. Once Thanos gets caught into a series of hits he will be rocked and not be able to do much. Thanos never teleports under his own power in battle. Does he even have that power anymore?
6. Shields will block if Thanos gets them up. But the times Thanos doesn't then we will be cut and ripped up by those claws and extensions.
7. DD has been shown to constantly overpower Superman in direct struggle grappling and even broke Superman's arm like a twig against Superman's own strength. Also DD had the power to send a fishing claw through Superman's shoulder as easy as going through water.