So I've highlighted a few words and I'll list them here:
self-interest - is your interest the same as the interest of someone else? Why should anyone care about your interests because they are meaningless to someone else
I enjoy life - does you enjoying the life have anything to do with order?
maximization of pleasure - there are psychos who have pleasure in heinous crimes and others who have pleasure in pain or seeing pain... and whose pleasure? A rapist has pleasure but I'm sure the one who is being raped isn't- the fact that all you have to care about is you 'personal meaning' can reconcile this act as 'meaningful'.
minimization of pain- whose pain?
Also the very things you mentioned can/are used to kill others as well...
Peace be unto you