But it gets worse. For you see, normally, even though a learn by doing system results in you having little agency in your character development, and a lot of skills you might not want on your character, at the minimum, it doesn't result in your character getting worse. The trouble with Tyranny, however, is that it combines learn by doing with level scaling, such that your level is decided by the overall amount of skills you have. Thus, you can end up with a lot of useless skills - say, six different weapon skills when you use only one weapon - and be wondering why the hell is your character getting worse and worse relative to the enemies, because those six different weapon skills caused your character to get additional levels that the level scaling system then adapts to by saying, 'well obviously, you need harder enemies.'
Sadly, the shit doesn't even end there. Quest experience in Tyranny is divided up between the skills your character has. Thus, learning a new skill at any stage in the game, and especially skills you don't want to use, weakens your character, because it leads to all your primary skills receiving less experience and less development. And the genius of Obsidian is such that talking to your companions can cause you to learn skills that you don't want to use. An example is Verse, who will teach you skills like Dual Wielding and Bows through conversation topics.