I think NATO effectively no longer exists anyway - better to get rid of it sooner rather than later.

De facto NATO is dead, because the US - it's most powerful member - can no longer be trusted. I hope the political leaders of all other Member States see this.

But that doesn't mean it no longer any value. It's main goal has become deterrence, and Russia and China still need to be deterred.

because it has brought nothing but misery since the end of World War II.

This is totally false, you can argue it has brought misery but you cannot say it didn't bring any good.

The 80 years before it's creation (and the creation of the UN) have been much more violent than the 80 years since. Sure Asia and the Global South haven't shared in the peace it brought, but it's not like the west had brought peace there before.

There might be a better future without Nato, but i don't think the world as a whole would've been better off if Nato never existed in the first place. The Sovjet union would probably still be there for example, and except for the ruling class that was not a nice place to live in.