If joon can do 6 reps with 60kg with bad form, he could probably get 12 good ones with 50kg, which is awesome for a natural (which he is not). But you would still probably think that's a woman's weight even tho I don't know any natural female trainer who trains as a hobby who can even curl 30kg for 10.
It shouldn't matter what anyone else thinks of your lifts, natural or not. If you know you're stronger than you were be happy.
I know I'm stronger than the average gym rat, and I'm happy in that fact because I worked for it. But I don't expect anyone else to be impressed when I know there are guys lifting in the 1,000 lbs range.
There is always someone stronger at something, whether enhanced or natural, they had to bust their ass for it. It's not all about where you're at but how far you've come.