Charles wanted kingship decades ago but mom hung on and on and on and on yet Charles got his wish at an old age.
A better man would have passed his spot to his oldest son for the good of England. But Charles is a child.
That isn’t how succession in a monarchy works; it would degrade the entire process and the ideals upon which it is based.
Being Queen Regnant or King Regnant isn’t something you can just ‘put down’, if you have any respect for the institution at all.