The general public are dangerously apathetic about politicians lying, being corrupt or avoiding scrutiny. A key component of Johnson's election campaign was avoiding questioning. His ministers who did face it were given a tight script/mantra to stick to and if they deviated from it were benched. This was blindingly obvious, but a significant proportion of the electorate either didn't care or thought it was a price worth paying to "get brexit done".
Many didn't truly understand the "price" they were so willing to pay. Many didn't and still don't, understand what "getting brexit done" really means or why they felt it was so important to rush it through at any cost. But they were told it was important and in any case they were getting a bit tired of hearing about it. Which is surely the best reason to rush something through, getting bored.
Then you throw into the mix we don't really have anything in law or the constitution to hold the government to account if they decide to do whatever they want. It's not been needed before because previous governments have accepted there is an unwritten understanding that there is a minimum standard of behaviour and conduct. Cummings (I suspect) has spotted that previous governments have voluntarily followed this unwritten code of conduct. Get caught out and you resign. But actually, if a government with a majority chooses not to, particularly if you ensure most of your MPs are blindly loyal rather than competent, then there's not really anything anyone can do about.
That combined with the apathy of the general public is why we are where we are and will be till the middle of the decade at least. Even if they do **** off the public significantly, they rely on it being forgotten about after a few weeks. They're probably right. It's like an episode of black mirror. I shudder to think of the damage they'll do if the last 6 months are anything to go on.
Still. Jeremy Corbyn eh?