Let's start by not being so diligent on Diesel passenger cars' emissions, unregulated CFC production in China, not investing in PUE reduction sooner, not forcing effective filtering in coal power plants in some countries.
We can continue with (un)controlled deforestation for mining and palm oil (and increasing its use despite its health hazards), uncontrolled tapping of natural water resources just to sell it as bottled water (remember Nestlé CEO doesn't believe that water is a human right because they can sell it).
Let's add burning petrol wells, untapped methane leaks, oil companies' lobbying to slow down EV adoption, etc. etc. etc...
More on EVs & cars: Formula 1 cars are hybrids way before passenger cars were. This tech would have trickled down way earlier in history. SAAB made 4-cylinter Turbocharged 9-3 and made a compelling, powerful car for everyone, but everyone, esp. US. opted for V8s for "manly" reasons.
...lastly, let's not get started on single-use plastics and how we have been deceived with this arrowy-triangle and recycling.
We had the chance.
P.S.: I keep adding things, but there's also planned obsolescence. e.g.: I have a perfectly fine BT headphone with great sound quality, but I can't replace its battery without destroying it. How being able to replace its battery impacts my quality of life?