Siting there and complaining about your failure or group failure will not solve anything rather it will create divisions among yourself and hence lower group morale and passion to work as a team. To avoid the complaints just ask your self “What am I done to make the situation better?”
Be critics but don’t be naive, give credits if other did well and criticize when needed. too much critics reduce morale and others will always fear you or they may be always prepared for a protective mechanism. This situation will not help in making teams perform best they can.
Everybody is unique in seeing, doing, speaking and perceiving things . Be yourself and do as yourself. The moment you start comparing yourself to other the very moment you will start falling