Not really crushing anything, being the ruler of Capricorn, a very ambitious sign with indeed, a big ego. Saturn as an Ascendant ruler (as is for me too) is an influence which comes in much easier way to the querent than it is for other people who don't have him as an Ascendant ruler. And being Lord of the first house, he does boost the ego albeit through some challenges. It also gives physical strength of the quiet, persevering type. As well as slower aging, Saturn is Lord of Time. And many other things. But crushing the ego as lord of the Ascendant he doesn't. Saturn hates drama.
I had him on my natal Sun till a year ago, will have him in the first, being my Lord of the Ascendant from next year. Good care of the health was essential, went to see my doctor each time the slightest thing felt wrong. Took care of my teeth without allowing him to remind me. Increased my vitamin D intake to prevent bone failures, improved my vitamin and eating regime. Saturn requires discipline and perseverance. And patience. If you give him that, you'll be OK. And work consciously on staying positive, especially during transits to the natal Sun and Moon. They may be emotionally draining.