Let’s think that you do workout daily, and didn’t have arrest day in a week and even working out for 7 days daily you have a normal type of body, but on the other hand someone who is working 5 to 6 days a week have a better built body than you and you are shocked to see that. And you want to find the reason behind this.
You can’t get in a good shape or can’t develop a good muscular body just by lifting heavy, there are proper forms, there are proper techniques, there are proper diet charts which helps a lot. Doing workout without knowledge is kind of damaging your body yourself.