Of course you left out context.. the context of Thanos allowing that to happen.. the context of Thanos trying to put on a show for death.. How do you put on a show.. by making it seem difficult. We saw spiderman kick and move Thanos almost over.. yet Thanos can walk through an odin gungnir blast.. does that makes sense to you? M. Thor can knock over Thanos with a hammer shot.. yet a weaker clone can stop Thor's hammer with his TK with ease.. Does that makes sense to you.. We aren't even talking about regular Thanos either we are talking IG weilding Thanos... The context is.. he was putting on a show and allowing all that to happen to make it seem like they had a chance... It was further a case of PIS for the sake of the story.. How fun would it be for Thanos to have pwned all of them with a gesture from another galaxy away? It wouldn't have been.
You also realize.. that even in a normal situation that blow would've have done a thing to Thanos right? You know thanos has a very good healing factor as well right? He's been through a lot worse and healed from a lot worse than Wolv. claws being shoved inside him... Being at the nexus of reality and the black hole come to mind... He heals very quickly.. maybe not as quickly as the Hulk but very quickly. If he can heal from those severe attacks quickly.. why would someone with no cutting ability even pose a threat to him.. Do you honestly think he would punch him to death? lol. Show me Thanos getting KO'd by punches in his entire history.. It doesn't exist.. He has only been KO'd a couple of times and that was via energy.. blunt force trama does very little to Thanos.. So what is Hulk going to do again?
Now you're not getting something here which is undisputable... Prof. Hulk is still very strong.. Prof.. hulk was still pissed.. this was base level hulk this was already pissed off hulk WITH WITH WITH another pissed off class 100 brick in The Thing... So do you get how much stronger that makes Thanos? If he can EASILY overpower a pissed off Prof Hulk WITH the help of another class 100 guy.. with ease... what does that tell us... He is a lot stronger than a hulk that is already raging and building up strength and another class 100 AT THE SAME TIME. Thanos even tells us... 'you call yourselves strong... I'm strength personified" That is how ease it was and how little he thought of both their strength at the same time... So.. your whole WWH will already be stronger is just nonsense... Even that Hulk would have to build up enough anger just to match where Thanos is already at... Now onto your no limit fallacy...
You do realize that saying Hulk can get as strong as he wants doesn't work right? We've never ever seen Hulk get mad enough to be as strong as his hyperbole implies.. Now I'm not saying it's not part of his powerset.. I'm saying... he never ever makes it to that level.. so to say that this is a possibility in a normal situation is just plain off. In fact, it's not even in the realm of possiblities since we've never seen it in all of Hulk appearances.. 1000s of them. To go further...
One reason why we don't see it is he's KO'd or put down before that. Now you avoided my question before but try and answer it now... HERE IT IS.. You do realize that Hulk has been KO'd A LOT more times than Thanos has ever been KO'd. Thanos doesn't even get KO'd from punches or blunt force Trama... Hammer shots from a amped Thor with the PG all made him smile and come back for more.. However, Hulk has been KO'd countless times before ever reaching this "I can get as strong as I need to be" level... So what is clear is if anybody is getting KO'd via blunt force trama it's Hulk not Thanos.