Learning is always challenging yourself.
You always hear the same line in great athletes, their toughest critic is themselves.
Block out the noise and what other people are doing or what they think and concentrate on doing what you do better - Challenge Yourself -
How can you improve your part of the process ?
How you do your job better ?
If you did good today, how can you do it better tomorrow?
Especially with today's technology there is always ways we can improve, don't settle.
One thing for sure there will always be someone around you that is hungrier and maybe more motivated, don't be envious or angry - be motivated-.
Learn every day, learn from everyone around you every day, rather it is their attitude or their process or style - take it in and make a mental note and see the positive.
Challenge Yourself !