Why is life a continuous struggle? Or do you see it as a blessing..

Sometimes I feel life is a continuous struggle. Sometimes it can be a blessing. But well, more struggle. It would seem that well, at least for me, life is just like that.
As a baby, my father did not really want me. He was just too happy to wash his hands off me, once he divorced my mother. Other men, no matter how much they hate or have bitter feelings for their exes still find time to spend with their children and love them, but oh no, not mine. He just could not care less. It was a good riddance for him.
Then as a kid, I had to struggle with my mother's decline into depression and also gambling addiction. As a teen, I had my own hormones, unwanted events, and school.. Had to struggle to get good grades or at least reasonable ones to make my mother proud or at least contented.
Then once falling in love and deciding to get married, the struggle of starting a new life, a new family, bringing up the kids and so on.
Then we got divorced, and I had to learn to struggle to get on with life, to make my self stronger, especially since I had no one who supported me or stand by me.
Now that I'm in my mid 30's, remarried and a mother of a toddler, have to go through life struggles of learning how to handle all the new challenges that comes along. And in my choice of career, the struggle to keep my clients, get new ones and handling disgruntled clients. My struggles will not end as I foresee having to struggle to put my kids into higher education, and to save for my own retirement, with the hope and providing that I do not fall ill and need additional funds like my mother for hospital and such..
But in it all, I thank God for life's little blessings of good friends who care and especially my long suffering husband who gives in to my whims once a while, and who stands by me and love me for me.. My children who loves this long suffering and sometimes overbearing individual unconditionally.. And you know what? It does make my struggles somewhat worthwhile..
So to my friends, thanks for being there, whether you're my real friends for the past years.. My oversea friends who just share my thoughts, complains, ideas and such through paper or email, or facebook or twitter pals, thanks so much for being there and being a friend.
To my husband, who's my other half, my port in the storm, my pillar of strength, who loves this insecured and weird woman, thanks for sharing my life, for your love and patience and understanding..
To my kids, I'm not the world's best mother and I probably let you down countless times but you know what, I am thankful for your presence in my life, and I love you too.. And will do my best for you all..