Am I Good At My Job?

I was talking with a friend recently about some of their co-workers. In this case, they were complaining that another person couldn't do some tasks that my friend considered relatively easy things. Deal with an unusual restore situation, write some PowerShell to reconfigure servers, build somewhat complex (to them) queries, etc. Things that my friend thinks most database people should be able to do after a year of experience. However, my friend questioned whether they were evaluating co-workers appropriately. How can one tell? I might be able to tell if a coworker is better or worse at a task, but what's my frame of reference and my experience. I might think them not capable at things I do well. At the same time, I can be wowed by someone with more experience with a technology I don't know well, such as Azure Data Factory, but not really be able to judge if they're average or an expert. Read the rest of Am I Good At My Job?