It is 100 percent okay to stop using it today and join the "boo AI" club.
This isn't a purity thing. This is a "everyone stand with us against destroying the environment and giving asthma to poor people" thing.
Did you know that when one community says no to an AI data center, they specifically search out communities with fewer resources? Communities that can't defend themselves? And the pollution 100 percent affects their health and wellbeing, in addition to burning through our already scarce drinking water.
You can stop using character.ai today. You can say "I listened to the facts and stopped." And another thing: don't you think it's a bit more impactful to have used it, stopped, and then you're in a position to say how little it helped? How doing things for yourself improved your life?