Anyone else wish mankind would go infertile?

No, it's not a pie-in-the-sky "things could get better if we discover X, Y, and Z". It's a huge book, and there's all kinds of stuff including sort of philosophical elements; but in terms of the hard data I'm talking about, representing the positive change that has ALREADY happened, you can see a lot at the site World In Data.

"In 2019, an estimated 761 million people did not have electricity. Two decades ago more than 1.6 billion people were in this position."
Source: https://ourworldindata.org/number-without-electricity

"Electricity from utility-scale solar photovoltaics cost $359 per MWh in 2009. Within just one decade the price declined by 89% and the relative price flipped: the electricity price that you need to charge to break even with the new average coal plant is now much higher than what you can offer your customers when you build a wind or solar plant."
Source: https://ourworldindata.org/cheap-renewables-growth

As for the "population explosion":

"The global average fertility rate is around 2.3 children per woman today. Over the last 50 years the global fertility rate has halved. And over the course of the modernization of societies the number of children per woman decreases very substantially."
Source: https://ourworldindata.org/fertility-rate#the-global-fertility-rate-has-halved-in-the-last-50-years

Meanwhile, global levels of hunger and extreme poverty have dropped by a staggering scale no one could have predicted 25-30 years ago.

"There are more than a billion fewer people living below the International Poverty Line of $2.15 per day today than in 1990. On average, the number declined by 47 million every year, or 130,000 people each day."
Source: https://ourworldindata.org/poverty?insight=global-extreme-poverty-declined-substantially-over-the-last-generation#key-insights-on-poverty

In 1990, 37.81% of the world fell underneath that International Poverty Line; by 2019 it was only 8.44%. This is a MASSIVE improvement.

Your misconceptions are unfortunately very common in the industrialized world. I know it's hard to upend a fundamental aspect of your worldview, but you should really try, because the facts are totally against you. And those actually living in the developing world understand this much better:

https://ourworldindata.org/wrong-about-the-world
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In these poorer countries more people understand how global poverty has changed. People in richer countries on the other hand – in which the majority of the population escaped extreme poverty some generations ago – have a very wrong perception about what is happening to global poverty.

We are not just wrong about global poverty. In the same survey people were asked: “In the last 20 years, has the child mortality rate in developing regions increased, decreased or stayed about the same?”

Here again the data is very clear. The child mortality rate in both the less- and least-developed countries has halved in the last 20 years.[...]

This has to be one of humanity’s greatest achievements.

And just as with knowledge about extreme poverty, the share of uninformed people is much higher in the rich countries of the world. So is our work at Our World in Data needed? This survey shows that few Senegalese or Kenyans will learn something new; but if you have some friends in the US or Japan you will probably help them if you share our work.