You look extremely similar throughout incarnations (basically like a twin of yourself) because your Elemental template is very similar and what DNA you have to be incarnated from has to be similar.
You can do meditations to be more attractive, becoming a more beautiful, perfected and proportional version OF YOURSELF (including biokinesis on the higher levels in removing deformities and physical issues), but you will never wake up looking like the Gigachad eldritch beast or Linda Evangelista. Beauty has to correspond with the unique design of your soul, you cannot be somebody else.
The Gods are all beautiful, but their faces are not identical to one another. Not even close.
Killing yourself is not going to change anything and the trauma of this can make people worse off in many regards. You are locked into your own soul whether you like it or not. So... you might as well make improvements while you have the ability to do so, doing it all while being alive is the only way to do this.