Are these sentences OK? Or, what do you say?
for a job etc.

Don't be complacent, you're still incompetent.
Don't be complacent, you still have a lot of inadequacies

Question

Are these sentences OK? Or, what do you say?
for a job etc.

Don't be complacent, you're still incompetent.
Don't be complacent, you still have a lot of inadequacies

Answer

No, never. You would be considered extremely rude. Always compliment first and then correct. So maybe something along the lines of "you're doing great at this (area), but you could stand some improvement in (other area).