The new TOS didn't really change much for one to one conversation but it exposed the previous TOS when people started comparing clauses and actually read it. I accepted the terms and use WhatsApp if I absolutely have to. No personal stuff there. They still have my metadata but I've tried to give them as little data as possible. No status and no profile photo. No Google drive backups.
Dopamine fasting is not for hitting a dopamine zero. It is just to reset the system to its natural state so that it reacts to normal levels of dopamine.