Yeah well, honestly I don't really care what you think because there is no point in even discussing this with someone whose view is completely opposed. There is no common ground. I will simply say that you should give some credit to the personal developement Ciri goes through in the books and take that and the time since the books to come into her own even more much more into account than you seem to be doing.
Also if you seriously think Yen would or could murder someone like Avallach you seriously overestimate her power, underestimate his and also underestimate her as well for not accepting Ciri's decisions even though, throughout the game, it is clearly shown that she does. She even tells you she expected you to go with Ciri to fight Imlerith and doesn't say a word against it.
Furthermore it is really simplisitic thinking if you think about telling Geralt of her plans as a sort of: daddy please help me moment. It's about trust. It's about telling Geralt because she trusts him and knows he will support her even though it might be difficult. So either they should have connected it to the decision system, in which she will tell you, when you support her independance, or through some other means because the book Ciri would not simply fuck off without saying a word to Geralt and Yen. It's about trusting the two individuals who have helped her grow as a person the most. The surrogate mother who taught her about sex and sexuality, magic, politics and in general life and the surrogate dad who trained her, taught her how to survive, how to keep save, helped her during everything she has been through. Now those two are out of the loop because Ciri needs to be indepedant yet she relies on a bad crowd, a guy who basically wanted her to get raped and used as a breeding machine? Yeah... sorry read the books dude.