I think we can make a conscious choice to be happy.
It is a given that life is, by its very nature, extremely complicated and if it isn’t we will find a way to make it so. The trick might be to accept that despite your best efforts you will constantly be dodging obstacles.
Probably the hardest thing to decipher in this life is how much of the instruction you are given is actually useful and beneficial to you. We are all either privy or victims to parenting that depends on a luck of the draw and we sometimes spend years undoing damage. I don’t think anyone has it easy.
Contentment comes from within and radiates outward allowing you to filter the blows you receive from life. The perspective you gain then allows for more personal growth to add to your arsenal of weaponry.
At the end of the day I have very little to complain about and I know it. I can also look at the glass half empty or half full and that is a deliberate choice I make.
For some strange reason, accepting that suffering forms part of the natural state of existence helps soften the blow.