I'd say growth of inequality, then internet, pandemic, global warming, trump and ETC ( not all in that order necessarily ). There's lots of places that have gone to hell and I think 🤔 those are some of the reasons.
We need better infrastructure where it would be safer for cyclists too. Car drivers aren't ALWAYS the problem nor are the Cyclists. But having a combination of the two on some US roads / streets is insanity sometimes. Anyways, I am not here to argue.
Take care and be safe out there , whether You're a driver or a rider.