The V60 coffee method allows an even extraction of grounds making coffee cleaner and smoother. Here are some things that your could explore when preparing your next brew.
Change the temperature in the brewing process. The higher the temperature, the more bitter the extraction, a good range is between 80-95 degrees Celcius.
Grind size plays an important role in coffee extraction. Go as fine as you can trying to maintain a full extraction in under 4 minutes. Do this to explore coffee acidity.