I would take a su 85 or m36 over a panther any day of the week.
The panther is lost it has no real place. It needs a proper role. It should be a better version of the panzer 4 with good ai or have 0.75 moving accuracy so it can effectively do what it's supposed to be doing at the moment which is chasing down enemy tanks.
It does have extremely clear role. That role does -NOT- include going up against dedicated TDs and winning, unless you flank.
You being utter garbage player and incapable of utilizing that role does not mean it hasn't it.
Also, you'd fail just as hard with M36, so what's the difference for you?
If you'd like SU-85 more then panther, then I've got a briliant advise for you:
Don't spam panthers and build that JP4.