Why would my own father say if my mother was as big as I am, he would not even thing twice of pursuing me?

I’ve been overweight since I was 16. I was thin until age 16. And I just got lazy and tired of being thin. I’m currently 292lbs and 5’10”. I haven’t had a date in several years. Last time I dated was when I was 22. He dumped me for a slimmer woman. My shorter friends (5’5 and under) has boyfriends or has friends flocking over them. One is thick but the other two are slender.
I went in dates but it never came to a second date. My friend said, “Well the truth is that it’s your weight. You used to attack guys when you were at a healthy weight. I know we go through puberty but it doesn’t mean you should let yourself go. Some gifts like big girls but not obese.
My dad told me that I complain about being fat too much but not doing anything about it. Then he said, “Since you keep saying that, yes you ARE fat! You’re fat. You’ll never accomplish your health and you’re just too lazy. You eat the wrong foods and you’re too stubborn to listen to your doctor. You don’t care. You only care about what you put in your mouth and that’s why you gained all that weight. A couch potato that will never get a date! To but it bluntly, if your mother was as big as you were, I wouldn’t even think twice to pursue her.”

WOW….. I couldn’t even believe my own father would say that straight to my face. He is not a nice man at all! Jean ever been nice. He’s kind of a jerk. What was my mom thinking marrying him? She should have married a nice man.

I told him that was very nice and said, “Well it’s the truth and you asked for it. I’m not trying to be nice. I’m getting you to see REALITY. Lose weight.”
Bastard.

Updates
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My friend said my friends are in shape and look good and that’s why they attract men.
He said men like healthy women and that’s not me. He said my dad was very harsh but he had a very good reason to tell me to wake up.
Why would my own father say if my mother was as big as I am, he would not even thing twice of pursuing me?
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