Konan:
- She didn't have her own interests and was basically just a supporting pillar for Yahiko/Nagato.
- She does not belong to the most powerful Akatsuki, not counting her paper-ocean jutsu that was only created for killing Tobi
Nagato:
- He was such a great villain with impressive speeches, but then gets converted to Naruto's side by his own old words in a couple of minutes
- Him reviving all the dead people in Konoha was kinda cheesy
- He had a propensity to necromancy (but it was cool tho)
Kakashi:
- DMS was sh!t
- He is very very weak without a Sharingan
- The worshipping of Naruto became very annoying.