Romania - visting peles castle, all the train options takes more then 10 hours, is a car the only best option?

For exanple, heres the CFR timetable for the trains:

https://bilete.cfrcalatori.ro/ro-RO/Itineraries?tip-calatorie=on&DepartureStationName=Bra%C8%99ov&ArrivalStationName=Sinia&DepartureDate=26-01-2025&ora=08&lng=26.01.2025

Its all super long despite being a short driving distance :(. Do people usualy just do tours or take a car? unless you realy want to save money and sit on the train