When it's over and you look in the mirror, did you do the best you were capable of? If yes, you will probably be ok with the outcome

No one is an overachiever. How can you rise above your level of competency? Everyone is an underachiever to different degrees. The harder you work, the more luck you will have.

I like to give opinions, not suggestions

Don't get discouraged: it is often the last key in the bunch that opens the lock. Ability may get you to the top, but it takes character to keep you there.

You never fail if you know in your heart that you did the best of which you are capable. I did my best. That is all I could do. Are you going to make mistakes? Of course. But it is not failure if you make the full effort.

The best way to improve your team is to improve yourself.

Strive to accomplish the very best you are capable of. Nothing less than your best effort will suffice.