Good point about Aquaman. I underestimated him, if his armor is made of the same stuff as his trident he can definitely take a few blows from Thanos.
If Iron Man was significantly damaged, as in large parts are ripped off, then he would likely have died from the meteor. So it's likely he was either KO'd but took little damage, or spent the time digging himself out
Yeah, power stone was a dumb point since it seems to wreck both high tiers and street tiers. Makes scaling it difficult.
I doubt Tony would one shot Billy, but I think his amped battering ram strikes can definitely put the hurt on him. Also I consider the "Weapons of Man can't hurt us" a NLF, Billy doesn't have feats to tank repulsors, though, as you brought up, he could easily dodge it
I think Doomsday outstats Thanos but not by such a large margin. Thanos crushed vision's vibranium alloy skull easily and casually overpowered Hulk - who stopped a Leviathan just after transforming and moved Surtur with a body slam. Doomsday of course has better striking since he punched away Superman's bullrush. Thanos also crushed the tesseract and overpowered Thor who, with the help of Rocket, moved those massive mile long rings - easily a 100k ton feat
Wonder Woman's durability is good but below Thor. She took Doomsday's punches with the help of her shield. Besides that she isn't bulletproof, she got restrained by tank treads, and she was left quite dazed after 2 headbutts from Superman. Thor took Sokovia exploding in his face with no major damage. He took several punches from Hulk. He took hits from Thanos, who breaks apart Iron Man's armor, which was unscathed after a boosted hit from mjolnir (Tony was KO'd for some reason). He also barely survived a star. She also failed to kill the slower, weaker, and similarly armored Steppenwolf. Also what skill feats does she have better than Thor fodderizing SHIELD agents or going untouched against Asgardian soldiers, fight cinematography may be meh but he's obviously supposed to be and shown to be a skilled warrior
Worthy Cap seems to retain his powers for a little bit without the hammer. He did survive a slam after Thanos punched the hammer out of his hands, and a direct shot to the head after he got knocked off Thanos's back
I admit, I did underestimate the team though. I think they can take him 5-7/10, if Aquaman and Billy can distract long enough for Diana to get a clean shot
EDIT: Also wanted to add that a punch from Hulk dented a vibranium alloy wall whereas Thanos shatters it with his fingers. That punch, I cant find the calc, lowballed with real world metals was calced as 10k+ feat
Trident/Sword can definitely kill him, but Diana is the only one who can touch him since he outskills everyone else in the DCEU hard. Also that grenade was Star Lord's and he has tech that can restrain Iron Man, so I wouldn't count it was an anti feat since in the same scene he no sells a missile barrage from Iron Man. This fight is really Diana + 2 fodder vs Thanos. Thanos's armor also protected him from Stormbreaker, so I think it'll atleast block the sword
Aquaman on land, while injured, struggled to lift rubble and was heavily damaged by a hill level blast. Rescue, who should logially be weaker or equal to Iron Man, one shots space ships and I may be misremembering but also blasted apart Leviathans. Iron Man meanwhile tanks house sized meteors falling onto him and survives power stone blasts/punch. Though I admit, underwater he easily outstrengths tony
Shazam's best feat IIRC is shaking the mall with his punches and straining himself putting down a bus. His inexperience really hurts him, he's also bulletproof to small arms. He has yet to take anything on the level of Tony's arsenal.
Diana would honestly have been more useful than Fat Thor in the final fight since even Cap used Thor's powers better, but Thor has her beat in strength/durability by scaling to Hulk, who held up Avengers HQ with one arm and rocked Surtur, and Thanos, who crushed the tesseract. He also crushed Iron Man's armor with his fingers. Her best feat is stopping Doomsday's punch with her sword, likely an outlier since it just stopped dead and he otherwise swats her away like a fly
Worthy Cap likely also has Thor's stats since he survived punches from Thanos + his own skill and an unbreakable shield.
Overall I'd say MCU trinity has team DCEU beat in everything besides speed from WW, which is the only thing making this a fight.