I think you need to intelligently create and build a parallel institution, with goals, tools, and organization culture better aligned to the needs of building up communities while keeping order in a modern society.

Start with a small scope at the start, fulfilling a small need in a niche part of government. You want to avoid starting a large organization or growing fast, as that would require to lift pieces and personel from existing law enforcement. Then you demonstrate value and a better track record as you build the good-will and cultural cache to slowly expand and push out traditional law enforcement from more and more areas of concern. This should be fairly tractable, as most law enforcement forces these days have a vast array of duties.

You will need a deft political hand to avoid getting on the bad side of existing "law and order" political power centers. You need to present yourself as someone who cares about safety and wants to free up cops to focus on "serious crime". This will help you control the narrative and undermine the eventual "not tough on crime" arguments.