Is it worth living a "happy" life if that life is mediocre?

By whose standards? If it makes you happy, then so be it.

If it's a happy life to you, I don't think the type of life matters.

If it's a happy life it's not mediocre dude.

Well a “happy” life isn’t mediocre, because you’re happy.

Yes.

Let me rephrase. If you had the chance to do something great that would change a lot of lives for the better, would you do it if it meant letting go of a few of your own dreams?

If you're happy, that is a pretty good life. It has nothing to do with anything but your own attitude and courage to do what makes you happy.

Small, Medium, or Large
I've never liked okra 🤮

No. Vut thars mos lives.

How can the life feel mediocre and happy at the same time though?

life is mediocre, after a certain age. we get jaded

But it’s not mediocre if it’s truly happy.