I think you mainly have to do this yourself, but here are some possible changes you could use to get started:
- Encouraging a more positive community (supporting people of all races, religions, sexualities, genders, etc)
- Better limiting the amount of false information that is spread around (especially during the time of a pandemic)
- Stopping bots sooner (ones that spread hate, images we don't need to see, etc)
- And more!
I hope this gives you a starting point, good luck!