I don't get it...

I have yet to be able to understand the necessity people feel to live their lives with so much negativity. I mean, come on $#!* happens, why do you think that gives you license to go on and on and on about it? I am a realist and don't think of the proverbial glass as half full or half empty, it's just half a glass. I know bad stuff is going to happen, I don't look at the world through rose colored glasses. I also don't automatically think that the worst is going to happen either. I've lived through a lot of bad things in my life, but I don't dwell on them. I just look toward the future and live my life on day at a time and deal with the mishaps as they happen. I suffered abuse at the hand of someone who promised to take care of me and love me. I wished to take my own life to escape my abuser, until I decided I couldn't let him win. I lost custody of my kids for almost two years and had to fight to gain it back. I have been extremely poor and hungry and I have been alone and lost as well. I was teased and tormented for years just for not fitting in very well. I was taken advantage of and left to fend for myself. I have made many, many mistakes and I'm sure I will make many, many more...I just can't bring myself to hate, to wallow, to regret, or to feel sorry for myself in any way. I'm not going around saying that I haven't done any of the things, I have just moved on. Why dwell on the negative? I mean complaining about a situation or a mishap or bad thing that has happened to you isn't going to make it go away. I don't get it...