Do u agree?

People of all ages overestimate themselves and underestimate others.When we achieve a certain thing we try to glorify it as much as we can and we even add things like “I didn’t even try”.However when someone else achieves those things we are like,”they must have been preparing for a long time”or “he got lucky”or “he must have cheated the system”.Do u kinda agree to this or are you oblivious