I imagine "You're over-estimating your skills" has the potential to upset people regardless of their level of professional investment.

The right way to take it is as an observation that might or might not be accurate or actionable. The wrong way to take it would be "this person is insulting me because they hate me," or perhaps, "how dare you insult me." I feel like you're doing fine so far, for the record.

I also meant your job in your own world. What is it?