When anybody accuses me of such nonsense (having a 'pity party'). I simply say to them "ever felt low?", "ever been dumped?", "ever had someone treat you like crap?", "ever had one depressive thought?".
Their answer is always yes - because we ALL have.
Ask them what if someone had accused them of having a pity party at that time, how would they have felt?
You know what, all of our circumstances are different, all of our upbringings, but most importantly all of our personalities and the way we react to situations.
Two children can be brought up by the same set of abusive parents, one can be perfectly fine - the other can become suicidal or an addict or develop mental health issues (the case with my own family, myself being the latter).
I am so sick of people being judged by others because they manage to 'get on with and get through' life and some of us struggle. How dare they.
You are entitled to pity, you are entitled to cry out for and ask for help. You're human and it is your right and whoever said that needs a royal boot up their ass.