That's a really common pattern — the refactor trap. You ship v1, it works, then you see exactly what it should have been from the start.

I've started treating that moment as a feature not a bug. You only know the right architecture after you've built the wrong one. The scope creep part is harder though — that's where I try to keep a separate "ideas" list and not touch it until v1 is stable. Doesn't always work