I understand people are different, but I don't understand how it's the majority.
I don't mean to be sarcastic. Thanks for sharing your personal experience, but can I ask if you understand that perhaps you are not like the majority of people with regards to your weight?
The majority of people eat modern food and have modern levels of inactivity. Sure, we evolved in a scenario where our adapted characteristics kept us fit and slim, but the scenario has changed now.
Biological Evolution? No props from natural selection if you’re absolutely ripped and then die from a virus the week after.
Then why are women so attracted to muscular men?
Did you ask them? Many women find hypertrophied muscles off-putting.
Everyone was probably comparatively lean looking in the circumstances in which humanity evolved; we’re talking about small differences in fat storage and metabolism that are magnified by the environment that we’ve created.
Edited to add: obviously that’s before we consider the interplay between natural selection and sexual selection.
That would suggest that you perhaps don't completely understand that people are different. :)