Re: Putting yourself down
You're victim of your own success :o
This is not a case of modesty, I don't find you shy of talking about your professional achievements, I guess pretty much all old timers know that you work for a multi national as manager, you don't brag which is good. Could you be perfectionist/ lack confidence or uncomfortable with challenges? Your comfort zone needs to be stretched, a lot.
In your last para you've justified your professional reaction, for a start stop finding excuses for your attitude towards your own success. Tell your self that you've worked a lot to achieve what you have and you can do better. Aim for higher goals instead of looking at tiny little stuff as problems. Define a long term professional goal, and treat every successfully completed task as a step forward in achieving that goal, instead of proving to yourself to yourself.