That's kinda the point. She put ~150 or so masters up on crucifix equivalents in a past season but we kinda viewed it as ok at the time. It was presented as a bad political move but not an evil move. However in retrospect, she has always tried to rule by fear. In the same season her former slave advisor disobeyed orders because he thought he was doing the right thing. Dany's response was to publicly execute him to send a message.She put up ~150 masters for crucifixion after they crucified that many children, its one of Dany's darkest moves but it was still only targeted at the people who deserved it. And again with the execution, her strategy has always been to send public messages by targeting and singling out only those who are at fault. Just like last season when she asked the Tarlys to bend the knee and they refused, she burned them but nobody else.
She strongly disliked slavery but she was never a benevolent ruler while freeing them.
She is now in Westeros and has seen that the people despise her. In her mind they are closer to the masters instead of the slaves. She also has lost practically everything since coming to Westeros. The throne is the only thing she has left and even that goal is crumbling in front of her. She made the conscious decision to rule by fear before the battle, but during the battle it was mostly just anger imo. She tried to get them to surrender multiple times before but only now that she has lost her dragon and her close friend do they give up. She doesn't want them to avoid consequences that easily, she wants revenge.
That's classic game of thrones. People aren't supposed to have plot armor.
Euron was always annoying. Probably my least favorite character on the show. Should have let him drowned.
She's seen that people despise her but Dany has always believed in herself and known people will love her when she gets the chance to prove her worth. She's come to save them from tyrants, from people like cersei who blew up the sept and killed thousands of innocents. She repeatedly refrained from attacking KL with dragons because she said herself "I'm not here to be Queen of the ashes". She was mad and wanted revenge after what cersei and euron did last two episodes and rightly so, but she sank euron's fleet and cersei's army surrendered, she'd won and her revenge was there. All she had to do was wait for Jon to take the red keep and then she could get revenge on Cersei in any way she wanted.
That's just plain wrong, "she doesn't want them to avoid consequences that easily" of course, so she should go and find Cersei and make sure she brutally kills her and gives her what she deserves. Cersei doesn't give a single shame about anyone in KL, so Dany going on a rampage and killing them all isn't consequences for anyone, the people who have wronged her are in fact made to look good rather than bad, she becomes the tyrant Cersei was lying about. Its the complete opposite of revenge, its nonsensical. Dany has shown many times she knows the citizens of KL are poor and innocent people, she doesn't equate them to slave masters at all. In the end Cersei just gets unsatisfyingly crushed by a ceiling which is hardly revenge at all.
In the past Dany has lost many people she loved and gone through a lot of shame (Khal Drogo and the khallesar, her unborn child, her friend betraying her in Qarth, her dragons being stolen, Jorah betraying her and having to exile him, Ser Barristan dying, her betrothed in Mereen, her dragon and most of her allies last season etc.), but through it all she stayed strong and believed in herself, this turn in the space of two episodes is complete rubbish, not something Dany would ever do. If you're going to turn her into a genocidal psycho it needs way more build up.
What do you mean by "that's classic game of thrones"? Did you not understand what I was saying? I said character archs have been butchered and characters are useless now, they're dumb and repeating the same cliche lines, making shame jokes. This is nothing to do with plot armour, and its the complete opposite of "classic game of thrones" which was a character driven story where everything made sense and every character was written intelligently.
I'm glad you brought up plot armour though, because you're right people in GOT aren't supposed to have it yet it was all over the place this episode once again. Those ballistas brought down Rhaegal with 3 perfect shots last episode but not a single hit landed on Drogon since then? Arya got crushed by how many buildings, got caught right next to dragonfire how many times and still survived? Everyone that died was exactly expected to, plot armour is rampant in GOT now. At least this episode was nowhere near as bad as episode 3 for plot armour.