When you are constantly comparing things you are creating unhappiness in your life.
Instead of focusing on living your life and being happy, you end up comparing everything that you are doing to everything that other people are doing.
This is when the negativity starts to build within you.
You start to think that you aren’t good enough, that you won’t ever achieve the same type of success, you won’t be as happy, you’re not smart enough etc. etc.
If you must compare, use it as motivation for your success and drive to achieve the life and happiness that you want.