Does it really matter?

I have many ideas but then I realised it couldn't be fulfilled in reality due to so many limitations. Was I being self-centered? Do I have to do things to please others and also realised no matter what you couldn't please everyone. Some people will complain and procrastinate and in the end I will still be unhappy. I am not being extreme but in the end I may just forgo everything and do it my way. In this manner, nobody could say anything. Whoever say that sharing happiness is double the happiness is crap because I don't feel happy doing it at all, so double the misery.