Nice flawed argument (major bump btw, I couldn't let this slide)
Triss:
- Made a naive yet loyal and selfless act in favor off the lodge (makes up for it at the end of the books by choosing Geralt over the lodge)
- Doesn't help Geralt get his memory back out of her love for him (yet fully admits doing this later on)
Yen:
- Remember that time Yen almost floods skellige?
- Remember that time Yen literally used magic to turn Geralt into a slave?
- Remember that time Yen entangles him in a lengthy bit of drama with another long-time lover?
- Remember she literally fucks another guy behind Geralts back?
- Remember she also dangles the prospect of reconciliation in order to get him to compromise some personal rules he's set for himself so she can attain exotic magical ingredients.
- Remember she's an insufferable bitch hated by everyone?
- Remember that she's a literal hunchback?
Triss's fuck ups came from naive, selfless and loyal mistakes, Yens came from her being a general insufferable bitch.