I think “being intuitive” in regards to interface is both highly subjective and overrated thing and modern users who complain are too used to mobile interface that is so simple children are gonna first time see it and understand.
I thought about it today after using NextCloud and OpenUtau, both for the first time, and, like, I lost about ten seconds for searching functions on a lot of steps, and catched myself on thought “wtf is this it is unintuitive”, but after some thinking, it was actually pretty intuitive since I found them during 10 second while first time using this kind of application (kanban board in NextCloud and musical voice synthesizing in OpenUtau).
There is obvious problems when there is something that even after learning about how it works by trial and error you still think it should not work like that, but in cases above it wasn’t the case. And I think a lot of users trying to use OSS stuff or, for example, Mastodon, are talking about it being hard mostly because it is different in some (it is actually pretty small differences usually) design choices and they think it’s what makes it hard or unintuitive in general, where they just haven’t learned a tool (which software should be) slightly different for them and proprietary popular software is just making it easier for them to use unifying everything at the cost of features and making thinks look easier than they are