I really don't think being trans (or being cis) decides if you can become successful or not. Becoming successful in life is difficult for anyone. But also, what constitutes as success is not the same for everyone. I'd consider any person who lives a happy life that they're satisfied with to be successful, whether they're a politician or a baker, married or single, have kids or no kids, live in an apartment or a big fancy house, etc. So yeah, I could list a lot of successful trans people.
Back in my transition I was the most inspired by Buck Angel, because that's the field of work that I personally want to succeed in, but that's not gonna be everyone's cup of tea. It's not his fame or his wallet size I strive for, but his passion for life and managing it well with that career. Luckily for me, that kind of field has a place for all sorts of body types, trans and cis, so why not also detrans. I can't see why not. But in no way do I expect it to be an easy road getting there.
I don't think I have much of an upper hand for being cis, considering my transition history and the detransition journey ahead of me. I'm an unconventional woman now. At this point I do not consider myself successful in any way. In fact I consider myself kinda exceptionally unlucky in life. It's been rough, and it continues to be. But I know I have the potential to succeed in life just like everyone else.
What success looks like for me I'm not sure yet, but I think it's something along the lines of finding love, becoming independent enough to feel "I got a good hang of things now", living in a decent place I don't hate (maybe suburbs of a big city), being able to make my own money even if it's not a lot, doing things I love doing, being inspirational to others, just enjoying life and feeling alright with myself. I do not want kids at any point, just a loving partner of unknown/either gender, and cats. My career of choice is really not about money, but about doing something I feel passionate about and that I think would be meaningful for me. That it comes with a huge amount of social stigma and legal complications doesn't and won't stop me. And that's how I know I can do it.
My advice to you (OP) is: stop comparing yourself to others, find your own strength and fire within yourself and don't stop trying. I know it's easier said than done, but absolutely possible. I know it's a cliché, but just believing it's possible will get you far.