Huh? I totally agree that the app store is a monopoly and leveraging the iOS app store to pressure spotify (a competitor to apple music) is anticompetitive.
But I'm very confused how you're twisting Apple's huge contribution toward LLVM and Webkit over the years into some evil act. Even if all you want is for GCC to be the best compiler it can be, work on LLVM has contributed to that goal by raising the bar. Predictably, GCC has gotten a lot better in the past decade or so. And I'm sure competition from LLVM has helped, just like how browser performance improved remarkably across the board when Chrome first came out. And Android's UI got way better after the iPhone was first released. (It used to be awful). Competition raises all boats; and consumers benefit when that happens.
Who exactly do you imagine is hurt by Apple's open source contributions to LLVM? If clang dethrones gcc it will be because llvm gives developers what we want - a faster compiler, faster executables, better IDE support or something else. My life is made measurably better by these things. Getting all that for free? Hallelujah.
If you don't like the direction Apple (and others) set for an opensource project you care about, you're free to build your own community around a fork. Thats what you would have to do anyway if you want a project to succeed without Apple's support.
What do you want? Great, free software? You've got it. The freedom to change that software however you want? Fork away, brave coder. The ability to sell software based on your changes? Go right ahead.
So where does that anger come from? How is anyone worse off?