You keep doing your part. Here people throw their rubbish in the corner next to the drain, but I go to 100 to throw mine away, and when they see me and tell me something I explain to them that everyone should do that, because the drain can get dirty and nobody comes there to pick it up afterwards, and that creates dirt and sources of infection that affect us.
Yesterday I saw Ileana sending her son to throw out the rubbish in 100.

And about the park, get your friends together and bring their own benches and sit near the bench that is destroyed and see if anyone realises that it needs to be fixed.
Go every day and sit there for a while. 😄