What has he achieve? A lot. Let us go through the list.
Electric Car Revolution
No, electric cars truely are better for the environment. Don't listen to the propaganda from the oil companies.
Even if you charge an EV with fossil fuel it is better than ICE car. Why? Because power stations have far higher efficience for their generators than a puny little ICE engine. A gas power plant has something like 60% efficiency while a car ICE engine is more like 20%.
Besides EVs get cleaner every year because we are building ever more renewable power generation. An ICE car doesn't get cleaner with time.
Batteries can be recycled, and putting them in a landfill is not actually a big problem. Much smaller problem than dealing with the slag from a coal mine.
Public transportation alone cannot save us. A diesel powered bus isn't going to save us from global warming. All transport needs electrification, and Tesla is spearheading that revolution.
Tesla did an exellent job of changing peoples perception of electric cars. People thought of them as ugly little underpowered golf cars. Tesla made EVs sexy, and got people who didn't even care about the environment to go electric. That is quite an achievement.
It doesn't matter how much solar panels and wind turbines we have, if our transportation is not electrified. 40% of fossil fuel usage is from transportation: Airplanes, ships, trucks, cars, busses , construction vechicles etc. Whatever you think, there no way around electrification.
The Rocket Revolution
The space industry is vital to humans. It plays a major role in communications, navigation, weather and climate forecasts. Rocket launches have until SpaceX arrived been extremely expensive. SpaceX has managed to reduce the price of launches 10x. That is quite an achievement and why they have pretty much taken over the whole launch industry.
This is important because sattelites matter a lot to us. One of the major players in climate science is NASA. Not without reason. To understand our planet and its climate we are very dependent on sattelites.
So what if Elon Musk wants to go to Mars? The rockets he builds are not single purpose. They can be used for anything. A rocket desgined to go to Mars can also send payload into low Earth orbit, to the moon or to scientific exploration of our solar system.
In fact the rocket Elon Musk is developing is already revolutionizing what scientists can do. If it gets successful, scientists have made it clear that it will completely revolutionrize our ability to explore our solar system and understand better how it developed, if there is life on other planets etc. Unless you completely hate science, this should be seen as a very positive thing and nothing to complain about.
Elon Musk is not aggrevating any situation by building rockets. Quite the contrary. NASA has been spending over $20 billion on a useless rocket to go to the moon. Every launch will cost $2 billion. That is a huge money waste. Elon Musk is creating a rocket with far better capability for a fraction of that amount which will launch for around $2 million. That is a 1000x cost reduction for tax payers. That is money which could be spent on fighting climate change.
Solar Power
In addition to electrifying transportation we need clean energy. Elon Musk is also pushing that with Solar City (now part of Tesla). He trying to make it affordabile for all people to have a solar powered home and battery storage for that power provided by Tesla.
https://electrek.co/2021/11/01/tesla-launches-new-solar-roof-tiles-more-power-higher-efficiency/
How is this not a good thing?
Your judgement is clouded because you look at everything Elon Musk does with a negativity filter. Anything positive is filtered out. All you see is the negative. You only want to see the negative because you hate the guy.
But even the worst people can have positive ideas. The Nazis e.g. was quite into recycling. Hitler strongly promoted vegetarian eating.
Al Capone the gangster introduced date stamping of milk saving the health of many children.
Yes, all these people are still utterly horrible, but it is a useful excercise in objectivity to look at horrible people and reckognize positive things they may have done. It is a common flaw in human psychology to attempt to downplay the positive any bad person may have done. We don't like to give credit to people we don't like.
