Truthfully, I think it was a missed opportunity.
"Hulk Moments" in past Avengers films were usually the highlights of those films.
Avengers 1 when Hulk went nuts on the Helicarrier and then against the Chitauri.
Avengers 2, Hulk vs Hulkbuster.
Thor: Ragnarok Hulk vs Thor.
He's practically guaranteed to be a great fight because he's essentially unbeatable.
Hulk vs. Thanos should've been the coup de grace for this series, but instead we got a 15 second fight in cramped quarters where Hulk looked like he'd been drinking all weekend.
Could've been an EPIC start to a once-in-a-lifetime film (Imagine if they'd given this fight the same attention they gave Hulk vs Hulkbuster. This would've been the audience's first intro to Thanos w/ Infinity Stones. Could've been a 2-3 min fight with the Hulk reaching new highs and losing anyway on account of the Power stone. This would have made the villain even MORE compelling without reducing Hulk to status, imo).
Nah, I liked the fact that it constantly subverted your expectations. Everyone got hype as fukk when Loki called out the Hulk and we see him laying into Thanos (Who we haven't seen in action yet) but we see Thanos completely manhandle the Hulk like a child.
shyt took the air out of your sails and we keep expecting Banner to redeem himself yet the movie keeps subverting our expectations to really drive in how powerful Thanos is.
It perfectly set up that Thanos was simply on another level over anything we've seen. He sees through Loki's tricks, he manhandles the Hulk and Thor, and he's offing folks.