I never perceived that statement as "All-Inclusive."
I read "We are living in the best time to be alive in all history" as being inclusive of everyone. But, like I said, if you're largely referring to middle class, straight, white, male, 40+ citizens of the US then I totally agree with the comment.
I am sure we are all awasre that this was not meant as an absolute all inclusive. That can't be right, never, especially on an individual level.
However there are broad trends and I would argue the top of that was somewhere around 2010.
Just take Tysons first point:
This is the least autocratic time (ie, most democratic) time in all history - https://ourworldindata.org/democracy
Just opening it will show a significant drop in democracy, with the highest point in 2004, 2010 or 2012, depending what you look at.
And this does not even include the rise of fascist politicians/parties, like Trump in the US or the AfD in Germany, which got the most votes everywhere in the former GDR except the 2 biggest cities.
I would also strongly go against his point of the climate - we likely broke the 1,5°C goal last year, which means whatever it will be, it will be catatrophic, the question is just how much. There are already significant increases in deadly weather and weather damages.
Also the happiness graph of Europe ends in 2016 - a time of economic hight, before Brexit and Ukraine. I doubt the levels are the same.
I think there are 2 general trends: Life is getting better for those who are still on the lower levels - many Chinese, Africans and some South American countries. Because improvement is cheaper and even with e.g. high corruption levels there is still enough improvement left to increase general levels.
But for the Top 25 countries, life for those not in the top quarter has gotten harder - which is a huge factor in the rise of the fascists.
It's what happened to the US Democrats: They looked at the statistics and told people that life was getting better. But that is not true for the lower stratas. Definitely not on a relative scale and sometimes not on an absolute scale.
It took, in Germany, until 2018 for the lowest 10% of income to reach the 2000 levels (price adjusted) again. And then the Corona and Ukraine inflation hit, with heating and food having the highest inflation. I don't know the current value but I am pretty sure we are under 2000 levels (pre Agenda 2010 to be precise) again.
But those are absolute levels. They are bad enough. In the same time the top 10% more than doubled their wealth and the top 1% nearly doubled their income.
If there is one constant in human societies it is this: The more unequal the distribution of wealth, the more likely a - in most cases very violent - upheavel is. This is literally what our oldest written documents are about.