I bet that's the exact reason why you drive that exact car. Because of course the coolant, oil, acid batteries, etc. your car uses is disposed of correctly, or one of the hundreds of parts that needs replacing every X amount of time in an ICE. Never mind the waste that oil production itself causes.
https://www.theguardian.com/business/2021/mar/01/fossil-fuel...
New modes of transportation and energy generation will not be 100% clean and waste free, I think it would be naive to think we could actually do that. But they can be steps in the right direction.
If your cynical assumption is that we can't do it right anyway, why do you even pretend that driving your old car is somehow better? If we won't dispose of lithium batteries properly, we won't dispose of all the things your old car produces either.