Literally her entire character over the last 8 seasons, it seems.
Don't you remember Dany's long established and well developed hatred of bells?
It's a shame because I thought Emilia Clarke was great in this episode (the first half, before she was just a dot in the distnace setting things on fire), some of her best acting in the whole show. She could be a convincing mad queen! And the imagery was suitably shocking enough to show the horror of what she was doing. But the problem is the writing did not justify this turn in her character at all. And that's kind of a huge problem!
Cersei gets about six lines in her last ever episode? She didn't actually have a plan? She just executed Missandei in front of Dany last week then let all her enemies live (so many giant crossbows aimed at them!) for a laugh or something? Jaime didn't even kill her? Didn't they include the prophecy about her being killed by her younger brother in the show (I'm pretty sure they did.)
The Clegane fight looked cool but felt pretty empty (hey, it's a metaphor for this season!) considering Gregor's been an undead zombie on his third or fourth actor for a few seasons now.
There wasn't really much point in Arya being there? I mean there were some highly impressive tracking shots of her running about, but Sandor could have given her that speech back in Winterfell and saved her a really long trip. And about four false death scenes.
There sure were a lot of Dothraki still alive after we seemingly saw 95% of them dying.
Euron appeaing out of nowhere to fight Jamie was dumb but I guess doing dumb stuff is Euron's character. It's weird how he could shoot Rhaegal in the air three times last week but kept missing Drogon.
But yeah the special effects were good.