Can you survive normally inside an underground lavish big shelter with everything, food, recreation etc

Nope

No way

Am I alone or do I have a partner

Probably but i wouldn’t want to go without seeing the outdoors and nature and natural sunlight once in awhile at least

I don't think so. Most people would break mentally at some point.

Oh dear. I am not sure the human body is meant for such deprivation.

I think I'd go insane.

That's a fantasy the uber rich want to indulge!
They're building the bunkers and destroying our planet just to give it a try.
The book is out -"Survival of the Richest" by Douglas Rushkov.

Don't even think about going underground, the world isn't really that bad, it only looks bad on TV.

got to have some farm animals.

Nooooo😱

I have to have the light. The brain can’t function without light.

if it has everything i need i'll build a matrix there

with a matrix sun

Do you mean like a basement apartment?

No

While standing on my head.