Ok but the parallel between Cersei absolutely terrorising the shit out of Littlefinger in the "Power is Power" scene and Alicent being sexually abused by Larys in order to get him to do what she wants is just.marvellous.
They are both Queen regents. That literally means they are like one of the 5 most powerful people in all seven kingdoms, not to say the most powerful people in all seven kingdoms after the king himself. They both happen to have a faithful servant/counselor that also happens to be a psychotic murderous piece of shit, no disagreement on that. Both these counselors try to exert power over the Queens but the Queens' reactions are totally not the same. Littlefinger tries to scare Cersei by saying that he knows everything that happens, implying that he can take her down at any moment. Larys terrorises Alicent by executing murder that she didn't order, but in her name, thus blackmailing her. Cersei kindly reminds Littlefinger that he can be the most powerful and unhinged Lord in all Seven Kingdoms but she is still the Queen, on top of that she is fucking insane and she will cut his throat on the spot if he defies her again. Alicent on the other hand has Larys masturbate to her feet so that hopefully he will do as she wishes. Alicent, the Queen regent. That could literally order his execution on the spot. He is a simple disabled Lord and she is the Queen and she needs to give him sexual favours so that he obeys her? What she could have done is negotiate, and blackmail back, in a power move that is worthy of real Queen regents in history who had political wit and ruthlessness and ambition. A power move that is worthy or book!Alicent herself. Imagine the dialogue and the character development that scene could have given us. But nope, wasn't meant to be. What we got instead is a disabled person being creepy and abusive and Alicent being a victim yet again.
And you are still wondering why this isn't an engaging character? You are still wondering why the general audience doesn't give a fuck about her?