They may not have any love for op. It took me a long time to realise some parents really do not love or even like their children. As shocking as that might sound to healthy parents. Unthinkable but true, it is one of the last taboos.
Op how do you manage their dislike of you?
Have you considered why being beautiful is so important to them? Why being glamorous matters so much?
It is worth looking at why for your own benefit (not theirs) I would imagine your mother especially was under a great deal of pressure, ‘to be beautiful is to be loved’ brigade and the sole measure of her entire existence.
You wonder why they are unhappy? Why their lives lack depth and meaning? Living a one dimensional life that they have been conditioned to live, by their own parents, is actually soul destroying and heartbreaking.
They look at you, bucking the trend by being plain (that can also read wholesome/healthy/your own person/comfortable in your own style) and becoming independent and successfully navigating a career anyway and can’t believe it.
The value they place on beauty and charm means they can’t fathom how others exist or have value outside of their own childhood conditioning. Beauty literally equals love for some people.
Maybe they fear ‘no one’ will love you as you are, or that you are letting them down because you won’t just cooperate and start stepping up. I am sure your mother would love to get her hands on your hair/clothes/make up bag. I am not saying this is the reason, only that there will be reasons they are like this, and it hasn’t got anything to do with you, nothing at all, even if it feels directed at you op.
It’s a testament to your own strength that you haven’t given in, and you remain you. That you are not willing to sacrifice who you are to please them.
The corrosion of self worth is real when you are with them. No doubt they are doing significant harm to your confidence and self esteem.
Instead of celebrating your difference, they choose to be harsh and judgemental. Rather than feeling delighted by your developing personality and ability they chose to only use one yardstick to measure (and beat you with)
The truth is there are many yardsticks out there, thousands - millions and you get to choose which one you use in your life, or you can snap it in two and live your life exactly as YOU see fit.
It is a them problem - not a you problem.
I would be looking at ways to minimise your exposure to such unhealthy negativity, and to surround yourself with those that love you for the very person you are.