Radiohead song says:
But I’m a creep, I’m a weirdo
What the hell am I doing here? I don’t belong here
This is a good example of what you respectively should never say and what you should always wonder.
But, (I noticed) people who keeps groaning and moaning they are poor and useless, usually never step aside.
If you think you worth nothing, then please wonder what the hell you are doing in the team you belong.