Speaks to the quality and effort they are putting in this last season. Literally sipping Chai lattes while Phoning it in.
It really is about laziness. The overall story is mediocre, not great but serviceable--what kills it is laziness.
Take the ambush scene. Dany losing a dragon to an ambush could have been a tension filled scene that made up sympathize with Dany's mistake and anger. Imagine if that scene had started with most of their ships anchored after a short series of scenes showing them traveling for a week or two. Greyworm is the only one not resting/in camp, he's on a small scout ship at night. He spots the Greyjoy fleet, and runs back to tell Dany that their fleet is anchored in shallows unloading what seems to be supplies, it looks like Cersei is stocking up for a siege and if they continue the supplies it could make the siege much longer and more difficult (Since they don't want to use dragons and kill innocent people). But then you get Davos warning Dany the Greyjoys are experienced seamen and probably wouldn't make that mistake, it might be a trap--only to add "but they might not be accounting for dragons".
Then have Dany actually make a tense choice--does she strike and potentially deal a fatal blow, or does she remain cautious and risk a long, costly siege? Have Dany bet on her dragons--only to find the Greyjoys have hidden those scorpions under brush on large cliffs by the fleet. Show the audience the Euron is hard as fuck, and knows he's sacrificing men to get the dragons close enough to fire on--have the dragons come down, kill a bunch of greyjoy ships and as the one is hovering, THEN have Euron take it out. (Show Dany's side isn't totally incompetent, Euron had to sacrifice a lot to get the shot) The scene actually develops some stakes then, and it makes sense in terms of framing (The audience can now feel good about why the dragons were vulnerable, instead of wondering how the fuck they were being shot from miles away and/or the Dany missed a ton of ships on a clear day..) You might actually get some people debating about whether it was a good call to be bold and attack, or whether she should have been cautious...instead of everyone wondering what the fuck just happened.
I'm sure the above is actually dogshit, I'm not a writer..So I'd have to imagine an actual writer could do so much more to add tension and stakes, and I don't imagine it would take more than 15 minutes of screen time. Instead we got this fucking lazy ass, stupid scene. And that's the problem...so much of the show has become absolutely lazy. It truly is like schlock network TV, its ironically the exact shit Martin ran away from when he went to go write books and quit TV.