Nah. With 86K gross/year in Germany you get: around 4K for tax group 1 (single) and 4.7K for tax group 3 (married and your partner earns less than you).
Also, average rent in Berlin is among the cheapest (compared to other big cities like Hamburg, Dusseldorf and Munich). So, more like 1K/month for a decent apartment.
In any case, I agree with your overall statement: even if 86K/year puts you in the top 10% of earners in Germany, in reality it's hard to afford a decent house (not flat) with that salary (unless you wanna work until you're 67...)
For me it comes to an almost philosophical question: do you want to live like an average person in a developed country, or do you want to live better than average in a different place with a cheaper cost of living?
Thank you for the calc though, seems really helpful.
This salary calculator is extremely accurate https://www.brutto-netto-rechner.info/gehalt/gross_net_calcu...
In any case, I agree with your overall statement: even if 86K/year puts you in the top 10% of earners in Germany, in reality it's hard to afford a decent house (not flat) with that salary (unless you wanna work until you're 67...)