flawed

A flawed person or thing has some serious mistakes or weaknesses that need fixing.

When people say something is "flawed," they often mean it's not perfect. This can apply to all sorts of things: a movie with a poor plot might be called flawed, as might a person who makes bad decisions in their life. It's like someone pointing out the imperfections in a piece of jewelry - it still looks nice but could use some fixing. You might hear someone say "this policy is flawed" if they think it has some major problems that need to be addressed. Sometimes flaws are just small issues, while other times they're huge deal-breakers. Either way, the idea is that something isn't quite right and needs a little (or a lot) of work.