It does not matter in the slightest if others are critical of your methods, the only thing that is important is that you believe in what you are doing. You must be strong physically, mentally and emotionally today. Refuse to be discouraged.
You always expect the best of yourself, so you have every right to expect the best of other people too. If a colleague makes a less than excellent job of something today you must let them know they need to raise their game – or maybe you’ll replace them.