Yes and no. Money is an instrument that can be used to help fund things that bring happiness - trips, experiences, charity, basic needs. There is a lot to be said for not having to worry about whether or not you can write a check for whatever comes up. Money won't replace things that money can't by - a positive attitude, health, confidence, etc.
I have made more money before and have not been as happy but at that point in life, it was more important to acquire money than it was to actually use spend it.
I will make 30-50% more money this year than last year and it won't necessarily make me happy or unhappy but it will go towards a much better cause and the money will be forgotten but the security it brings will not.
Some of the issue for me with the money, that actually causes unhappiness, is the pressure I put on always one upping myself. The expectation that I've made X before, so now I need to make a least Y.
With that said, I would pay all of the money back to not be in pain on a daily basis.