I wouldn't say Doflamingo is a bad villain. But leaving a very strong logia fruit like the Mera Mera no mi out in the wild for someone to take it at the same time Luffy and Law is on the island is pretty fucking idiotic. Yes, one of his executives is out there to protect it, but it still seems stupid since you can't predict such things.
Having Diamamte and the executives to protect it seems good enough to me also remember that he knew the whereabouts of the Strawhats and once you go inside the Colisseum you cannot get out, so it was a completely safe game till Sabo appeared and Bellamy of all people became a traitor.
Everyone trusting that Doflamingo won't kill them anyways after seeing all the things that he's done is also not realistic whatsoever, then again this entire population is the same one that didn't suspect a pirate behind the event where their King and his soldiers start randomly killing everyone before Doflamingo saves the day. Then again, you have even less of an excuse for the pirates who were toys for who knows how long… I would say DD has shown quite some strength so far and is going to have his time soon enough.
I didn't understand the sudden change as well, but one thing is certain they were completely desperate and those who questioned it got turn into a toy, so yeah.
I really liked Fujitora in the beginning but his half assed approach recently has been pretty forgetful. Either go full force and attack one side, the other, or simply contain the situation to save citizens while the two sides handle it.
Luffy building an army is a really nice touch and brings back Mihawk's statement during the war. He's getting more and more people on his side, I wonder if they will be involved against Kaido soon after this arc.
It feels like Oda doesn't know what to do with Fujitora right now and Luffy didn't really build that army though, everything is on Usopp, but I know that by the end they'll be truthful to Luffy
–- Update From New Post Merge ---
-Strangely Pica seems to feel Chinjao and Elizabello combo attack. maybe he didn't move his real hand because he didn't expect such fire power. I wonder how many much of those Elizabello an throw.
I get the feeling that Pica can be hurt as long as you counter attack one of his attacks, so If you're just attacking and his blocking you will never hurt him