Yeah I agree with you OP
Of course it's impossible to isolate causes and say some things would have changed anyway but there are some things I've noticed myself that seem (from SM, newspapers and MN) to be replicated on a wider level that seem directly due to covid
e.g. so many threads on here about people being flaky, dropping out of events or just not wanting to socialise and I've experienced the same. Of course it could be just that everyone is 5 years older but it's interesting - before/during covid mostpeople would probably assume that after months of having their freedom heavily curtailed everyone would want to make up for what/who they've missed, and socialise more, but it seems to be the opposite - people got used to being at home, safe and comfortable and don't want to come out!
school refusal rates have shot up and I think that's a pretty direct correlation that can be made with lockdown, even if other things like social media use or whatever might exacerbate it - if you tell kids they don't always have to go to school, and that doing so can be scary and even life threatening, they will take that on board!
Apart from anything else the way people reacted to lockdown was enlightening. So many people so keen to follow/scared of breaking "rules", even when they were patently ridiculous, and also so keen to judge others for utterly minor things/things that weren't even wrong, to the extent they informed on the neighbours to the police! The way some police forces completely overreacted and took advantage of their powers to enforce laws that either weren't in place at all and they had made up or misinterpreted, or that just needed a bit of common sense. Conversely, the people (government) who created laws that they seemed to think didn't apply to them. How quick some people were to 'write off' those of less use to society.
Of course there were some good examples too, the way some communities rallied round, dedication and effort shown by medical staff and others. But whereas before I perhaps had a slightly naïve 'that was then/they were them/things wouldn't happen like that here and now,' outlook on various historic regimes and despotic dictators, now I can completely see how quick people are to turn on each other and look out for number one - whether that's hoarding toilet roll or looking for scapegoats. Once you lose that lack of trust in society it's hard to get back, and I think a lot of people have (consciously or not) taken that onboard and amended their own outlook, and the way they behave, accordingly.