There is no problem in wanting to feel pleasure and act on that desire! Everyone wants to feel pleasure and live a carefree life, you aren't alone. Don't stress yourself because of it and no, you aren't a piece of shit. Being hedonistic to some degree is normal and is anyone a piece of shit for being like that? No, not at all.
Maybe you don't enjoy the feeling of pleasure but your body needs to feel some sort of happiness once in a while, even if you don't want it. It is how we function, in a way. Just let yourself be happy, no one will say anything and you'll feel a sense of pride and joy, even if it may be temporary, every second of it is worth it.