Ignoring or rebelling against using the intranet are learned behaviors that were reinforced by repeated poor experiences and infectious word of mouth between colleagues.  (Learned helplessness is a well-documented phenomenon: once somebody has been beaten down enough times, she gives up trying. That’s partly why we recommend against launching a bad UX, even with a plan to fix it later.) 

Kara Pernice and Patty Caya in 4 Noteworthy Intranet Design Trends in 2019