Yes, if you distribute dividends, there is 20% tax, but it is calculated on the gross amount.
So in order to pay out 80k after tax, 100k has to be distributed and taxed.
So if you want to receive 80k, 20k tax has to be paid, which is 25% of 80k.
I believe there was a reduced rate if you distribute dividends frequently, but I don't remember the details...
Probably not, but you should check with an accountant.