Does this mean Im weak physically and a wussy that cant fight?

Im 31 5'11 280. Ive never won a fight in my life. I have gotten beating down badly by every guy I fought in cluding recentally. Not to mention every guy I have fought is way smaller than me. Some 50 lbs some 100 pounds less. The last guy I fought wanted to fight me again. I backed down, So he sent his little bro on me who was 14 yrs old 5'7 145 pounds. His bro pushed me on the ground. I got up and pushed him and barely moved him. I dont know how? He was way smaller than me, After I pushed him he starting punching I did to but his punches were so powerful my punches had no effect. He beat me until I was crying and screaming and begging him to stop. I felt so manhandled. My wife had to yank him off of me. Since I was crying so bad. What des everyone think. Be brutally honest???????