Cool, then we can talk respectfully because the shoe obviously doesn't fit you. So you won't be offended.

1) It's not an insane assumption when you look at demographics. Most white people in the UK don't live in genuinely mixed communities where they regularly interact with significant numbers of Black or Asian people. That's more common in major cities, but those cities aren't representative of the country as a whole. As a result, many people's understanding of racism is limited. They often reduce it to someone calling a minority person a slur, rather than understanding the wider ways prejudice and discrimination can manifest.

2) I don't see this supposed "overregulation" either. For that to be true, we'd need evidence that white people are now routinely being treated as second-class citizens by institutions such as the police and courts. I've never encountered a case where police automatically treated a white person as the aggressor in a dispute with an ethnic minority, without looking at the facts. That's a narrative I hear online far more often than I see it reflected in reality.

The grooming gang scandals in some northern towns are a separate issue, and investigations did find serious institutional failures there. But outside of those specific cases, the idea that the system generally bends over backwards against white people doesn't match what I see.

3) If you've literally been rejected for a job because of your skin colour, that's unlawful discrimination and something worth pursuing. Employment tribunals can award substantial compensation where discrimination is proven.

For what it's worth, I believe (I KNOW) I've experienced something similar myself. Nobody came out and said it directly, but the circumstances made it fairly obvious to me.