I agree with you and so did Aaron and actually my sister-in-law and her boyfriend.
People clapped at that moment and while I got why it felt thrown just for kicks. To me it would have had much more of an impact if they were just one by one (or in unison) coming up and fighting Thanos but it lost the moment if you will by making it IMO a cheesy, thrown in because, moment when they were grouped together and posed for a moment. I rolled my eyes to be honest.
I don't know if the others I was with would agree on the Infinity Wars fight being better as we didn't discuss that but I just rewatched that scene on
YouTube and completely agree with you. That scene felt natural whereas Endgame felt forced.