A couple thoughts...
First, clearly you had a crappy experience. And that sucks. There are probably many others with bad stories as well. I'm deeply involved with my kids education and can only imagine how much that sucked.
Second, we can't solve everything at once. Hungry kids, bad parenting, all that will take time, and may never be resolved. I wish it could be, but honestly, it will take time - probably a long, long time.
Third, he's building for the future. Richer schools (both private and public) will get this first, typical schools will get it next, and poor schools (both administratively poor and monetarily poor) will get it eventually. This is where that great quote applies - "The future is here, it's just not evenly distributed" - and boy will it apply to education. So much so that some parents will feel like they are left in the stone age by comparison.
Fourth, an anecdote. I do volunteer work for an education-related non profit. I learned during covid that HISD (Houston school district) couldn't easily move to online learning because 30% of their students did not have internet access at home. Thirty percent!!! I was blown away. Still am. But it's gotten much better, and we've evolved. Does it still suck? Yes, undoubtedly (HISD was taken over by the state, if that tells you how big their problems are). So I know this will not be evenly distributed because of this experience.