What has happened to Hedgehogs?

Basically, we decimated the ecosystem that they were part of. We built on the land they made their homes in. We removed hedgerows and replaced them with fences with hard bases so they could no longer move around. We built more roads and more of them with higher curbing that they have a harder time climbing. We dumped many tonnes of pesticides and fertiliser onto the land which killed all the things that they eat and poisoned their drinking water. We also had a very long period where we put down slug pellets which just made slugs very easy to eat and fatally toxic. And we also accidentally poisoned them by leaving out bread and milk which turns out to be not very good for them. We made it functionally impossible for them to survive around us. I saw one for the first time in maybe a decade a few weeks ago. We were on holiday in a rural area and while out walking the dog before bed. It was an absolute unit. It would have struggled to turn around in a shoebox. It made me so happy to see one not just out and about but clearly thriving.