I don't know, I had babies in 2008, 2018, 2021.
I don't think it has got especially harder since 2008. I remember absolutely heart rending discussions on MN about how hard it was.
The only thing I do think has increased massively is the tendency of algorithms to latch onto new mums' worst anxieties and feed you loads of stuff which increases it rather than alleviates it.
For example I know a lot of people recognise my name on MN as being associated with car seats. But recently my algorithms seem OBSESSED with showing me horrific car crashes and if I didn't have a quite robust view on what I see as the risks of car travel already I can see that it would feed into anxiety.
Likewise sleep based "safety rule" content seems to have ramped up hugely, and I know that SIDS is a major anxiety provocation in general, I know I was worried about it when my DC were little. But I never got fed article after article about babies who died from cot death or accidental co-sleeping suffocation.
I did get caught up in some antivax stuff at one point which scared the pants off me and this seems more rife than ever now. (I did later conclude that the risks of vaccination are miniscule and the benefits huge).
Weaning advice on MN in 2009 was brilliant, it was all BLW and "chuck them a piece of brocolli!" and now my friends who are new mums are worrying about allergy schedules and all kinds of things. That's not come from NHS advice, it's come from the internet.
I know that when I was a new mum I got caught up in online "camps" and this led me to dismiss certain helpful advice because I was worried it was from "the other side". I do think that with algorithms this tendency is much worse. But I don't think everyone gets caught in this.
Is there still a lack of toddler groups etc since COVID? That would make a big difference IMO because I think it really really helps if you can find IRL friends going through the same thing.