I don’t think I regret anything, per se.
I do think your 20s are a time to do things, explore, discover who you are, and make the most of being able to be a bit carefree and responsibility free.
Mortgages, long-term partners and children all put paid to this, and there are decades and decades when you can dedicate your life to these things.
Your 20s should be, IMO, for having fun and discovering life, with other people in the same boat.
That doesn’t necessarily mean not having a decent job or trying to progress.
But there is your whole for settled domesticity. Don’t throw your 20s away on it, especially with a man who doesn’t see you as part of a supportive team, and who you can’t see yourself tethered to for another 60-odd years.