Ok. Im not saying, I don’t believe you.
I just felt the same when I relogged onto an old char and tested some stuff. I got wrecked. Then I realised I hat a complete passive reset. After respeccing my passives, I still felt that it was more difficult than before the patch.
But not as dramatic as you describe here. Maybe this is build dependant. Or there are bug that cause this but not for everybody equally.
I would expect there to be an overwhelming rant from all over the forum if there were such hard hitting global increases of difficulty.
Currently there are a few people that report these issues. Maybe its build related and a result of nerfs of specific skills/passives.