I see someone acting in what I view as a moral way. Perfect? Nope, but nobody is.
I brought up that fact since part of your dislike seemed to be that he seeks wealth. Hard to accomplish the things he has without it, I would argue.
If you don't start toward that goal, now, when? Living things expand or die. The planet has limited resources. If we don't start now (should have started decades ago, but politicians are horrible at long term planning) there's a very good chance we don't get there, dooming the species.
If they were not taken care of, you would most likely hear about it. Like this most recent woman. She dropped out of sight pretty quick, but has filed a paternity suit. Of the four confirmed mothers, none say anything about the kids not being taken care of. Grimes has asked him to keep the kids out of the spotlight.
Ok, so where do you go. You say the planet has limited resources. I agree. So where are we all going to go? All of us are going to Mars, which is significantly smaller than Earth?
I agree we should start towards the goal. But maybe that goal should be towards saving the planet we live on. Not what the green idiots want to do, but maybe some serious talk about what we can do without putting everyone in financial distress, but making some steps towards not dooming the species.
Assuming we can escape to Mars is a fantasy. I was a child when we walked on the moon. I heard all of the people say by the late 1970's we would have multiple moon bases. Then when I was a teenager, the Apollo project had been long cancelled. Nobody ever walked on the moon again and those bases were just SCI-FI dreams. That's what Mars is.
In the age of robotics and drones there is no reason for anyone to set foot on Mars. Those things did not exist in 1969 when man walked on the moon. Now they do. Manned missions to Mars make no sense when we can send robots and drones to do more than a man can do.
If Elon wants to go to Mars and wants to fund it with his money, no problem. Go for it. Just don't use my tax money to do so. He is into cutting the federal budget to the bone. No problem, but sorry no money to fund your SpaceX adventures. Pay for them yourself.