-Very stagnant product
-Cisco overlord control
-Minimal control of deal cycle
-Minimal flexibility in pricing
-Non-aggressive nature when it comes to winning deals and innovating
Duo was once a great organization that has unfortunately slowly deteriorated. The once best-of-breed product has been nearly replicated by competitors (MSFT and Okta). Ever since the Cisco acquisition in 2018, Duo has seen its most talented product, engineering, and sales folks leave in droves for different opportunities. This is common in the tech arena, however, Duo has not done a sufficient job in replacing core personnel that once made this company great. On top of this, the laid-back nature of the business has led to stagnation in the market with seemingly nothing to alter this course moving forward.
In short, Duo's "kinder than necessary" approach made the company great, but it ultimately suffocated the company in the long run. Cisco has only made it ten times worse.