[MAIN SPOILERS] I am getting frustrated with the biggest plot armour in GoT

I must admit, I am a bit salty after today's episode, as in what the hell can even stop Cersei. Since season one, she is constantly on the edge of being exposed on her crimes (which would eventually be her death basically) and yet everyone just dies around her and she keeps on moving. Biggest problem I have with her story is Qyburn. This guy has no reason to be loyal to her at all, yet he seemingly is not afraid of her at all, provides her the ultimate protection (wildfire, undead Mountain) etc. It's like she is the only character who has "cheats enabled" for the Game. Two great families are completely erased from Westeros (Tyrell and Martell), while she almost didn't have to do anything (her poisoning one of the Sand snakes is the first time she "had" to do something herself). She doesn't have any virtues which other Lannisters have (strategical thinking for example), yet even Iron Bank is going to start supporting her, which is completely out of the character for the Iron Bank. If they trust only in numbers, here is a number for them, 100% of her allies are dead (approximately).

Jamie was one of the best fighters ever, Tywin and Tyrion are by many considered to be among the most intelligent people in Westeros. What can we say about her virtues? Literally nothing. Just a lucky bitch, that's it. If any of other three Lannisters were in her position, I would still be immersed in that story line, but this just started feeling way too forced.

Also, compare her to Arya and Daenerys. These two characters had to go through a lot to get to the position of power. On the other hand, Cersei is just there.

I loved Cersei as a character and Lena Headey's acting is in my opinion Top 3 in Game of Thrones, but I just started disliking the direction of her story. It just breaks immersion for me.

I apologise if I didn't format properly my sentences, but I just had to let this out :)