Not op but going to give it a shot. Modern technology relies upon an ever increasing abundance of materials we currently have in finite quantities. Not only do we need to support whatever new technology is going to save us, we must also support the entire infrastructure of technology that has gotten us here. The power requirements for this have only ever increased. So you have two problems:
we are running out of raw materials. Indium (used in solar cells) will be gone in 30 years and gold will be gone (completely extracted ) in 20. This are things that, once gone, have no currently imaginable way of coming back. Most of these things are being wasted on consumer devices. These aren't things that provide basic life necessities (heat, hot water, housing, etc). Gold is wasted on consumer electronics in quantities too small to recycle. Centralized solar would be much more efficient. That's just a few examples of very important resources. The more important resource is water. Yes, you can desalinate, but that is energy intensive and so...
Electric power. Society's requirements for power have only ever increased and is not showing any signs of stopping. Maybe we can replace indium. Maybe nuclear or fusion. Oil and coal are only going to worsen the problem at this point. So We keep building gadgets that keep needing more power, and everyone has to have a new phone every 3 years coated in a metal with a supply chain ending in 20, and the sad truth is...
technology could have saved us ages ago if we were rational beings who could be happy with heat, hot water, and a high quality of medical care. We are not. We want more. We want electronics coated in gold. We want 24/7 access to a million videos of cats playing with string. We want it because we can buy it and someone wants to make money so they can buy more, and we deserve it because we worked hard and want to spend our labor on stuff that tickles our fancy. The ability to be entertained has slowly destroyed us and nothing, not even the most totalitarian fascist regime, has slowed the process.
If technology hasn't saved us yet, it's not going to. The world isn't our problem. We are the problem and until you can fix people you will not solve these problems.