It is spectacularly lacking in empathy to dismiss suffering and unhappiness in the UK as 'faulty thinking'.
Tell that to the many, many disabled and/ chronically ill people living in poverty here in the UK unable to afford secure housing or adequately nutritious food, let alone anything higher up on Maslow's hierarchy of needs. Not every disabled person has a family who are able to support them physically, emotionally or financially. There are lots of people who living extremely precarious lives with no chance of security or dignity.
Unhappiness in that situation is not faulty fucking thinking - it is a mentally healthy and sane response to a miserable and frightening situation.
A positive attitude is generally a good thing in life. However, it is not emotionally healthy to deny reality in the face of pain or grief or suffering, and cling to what is ultimately a hollow and fragile caricature of positivity.
In general, I find the people who are most keen that everyone embrace positivity (at all costs) are the ones who have a hard time swallowing the more unpalatable truths of the human condition. Overwhelming pain and suffering throws up uncomfortable questions.
That all said, I do think that for a lot of us stupidly fortunate folks - life is indeed a gift. I feel stupidly fortunate because, to date, I've experienced immense suffering - grief and loss - but also experienced great love, fun, excitement and moments of transcendence.
If you can squeeze out pleasure or joy or satisfaction or meaning, it most certainly is a gift in ways. However it is important to remember that we all play the cards we're dealt, and some people are dealt an impossible hand.
It is very human, and categorically NOT 'faulty thinking', to respond with despair when overwhelmed by pain.