Boycotting the P2P and MTX aspects of the game is not going to do much. Logging in is enough for SEGA to still make plenty of money. As long as the game is lively enough, people (normal players and whales) will still find it worthy to invest money into. If everybody who was angry at SEGA broke free from the Login Stamp and FOMO mind control and quit logging in all together, player counts would drop low enough to make SEGA reconsider their prorities as that would be an actual threat to their profits.
This is the only way. No matter how much you guys complain on here, SEGA is not going to read it. They do not care what we have to say. I'm sure at this point the GMs don't even relay player feedback anymore.
So, stop logging in and go play something else for the time being. I quit for now and uninstalled the game in June... I have no plans on returning until SEGA fixes this trash.