Why does everyone hate Duviri?

Hey guys, I'm working on my first Warframe video for my channel. I'm a big Duviri fan and I'm planning diving into the expansion and where it fell short. So that DE can hopefully avoid the same pitfalls in the future. As I know they are extremely good about listening to feedback and criticism from the community. If you guys wouldn't mind just giving me your opinions on Duviri, whether you liked it or not. As well as how DE can continue to keep pumping out banger content! Thanks guys