First season was mostly fine, but those penis armored nilfgardians...
Second season completely undermined established characters' morals. Yen acting like a 60s "irrational female character" archetype because "I want a baby", Vesemir just being OK with the prospect of creating more witchers, the way they made Eskel out to be an asshole and then just killed him...
Not at the cost of betraying Ciri though.