The entire point of building TDs is to D Ts. TDs are not medium tanks. They are their own thing designed SPECIFICALLY to counter units like the panther. Anything less will be food for the panther hands down and even the non Jackson TDs will be eaten in a 1v1 as well by exploiting their weaknesses (thus excluding the Jackson who has none)
The panthers role is to force your enemy to get TDs by invalidating medium armour with its superior armour health and pen
I agree it needs some refinement but it's not nearly as useless or helpless as you are making out.
How am I saying it’s useless? I said it’s slightly UP and needs an accuracy buff.
Also the Panther is a TD too in essence. If anything a panzer commander upgrade that improves accuracy like the Brits get that locks out the MG would be welcome.