I saw this, I liked it!
I am strengthened in my belief that most adaptations are better if you're unfamiliar with the source material. I didn't know anything about Fallout beyond Thumbs-Up Vault Dude, Nuka Cola and Dogmeat, and I think the show was improved by my ignorance.

I do agree the answers and twists we get in the last episode are largely unsatisfying, and the setting seemed unrealistically simplistic.
But the show treats death and horror as something to chuckle at, so that matches well with a simplistic setting and plot. Just chuckle at it and move on.

And I liked Lucy! Contrary to some of what I read here, I felt of all the characters she had the most depth and complexity. She definitely isn't a Mary Sue, because she consistently suffers because of her own flaws.

I think the show was a good closing act for my Prime subscription, because they doubled the price and I'm not sticking around for that.