It makes absolutely no difference if you think about it. It's not like choices are made for you even if the universe is determindric.
If the world is or isn't deterministic it's not like anything would meaningfully be different - things would still be unpredictable to us. In an indeterministic universe randomness would play a part in outcomes, but that's worthless to us. This meme is about choices anyways, randomness or determinism doesn't matter in the end.
That just makes me think of Everything Everywhere All At Once. I recommend watching it to anyone who feels they wasted their past options. Or if you like kick-ass martial arts shit, haha
I've accepted my past mistakes and, for the most part, don't get get bothered by them anymore. However, what does bother me is really not having an identity and passion to know where I want to take my life. It feels like I'm just living day to day until I eventually become dust.
Maybe start meditating. I know this is like, stupid random advice thrown at you from who knows where on the Internet, but it is definitely a journey worth starting.