I get it ... the icons released are not well liked.
These are most likely NOT the icons that will ship with RTM Win10, at least I hope not. This is still very much a development release, not even a beta.
Anyway, quite your itchin' - there are plenty of icons that you can choose . That's one of the best things MS did with Windows - you can do things 100 different ways and you can customize just about anything if you know how. That too is one of the difficulties people have with Windows "How come there are some many ways to do the same thing?
Knowing how to do something is what makes Designer Media forums so great. The tutorials and the members are well versed in many aspects of Windows. Some members know hardware, some members know software, some members know internals, and some members know a bit about a lot. We lean on each other to find solutions to issues, or to create a more personalized Windows.
I joined Vistax64 when I needed some help solving an issue on an HP laptop - turns out, the Mobo was dying. I ditched that laptop and bought one with Win7, I came to SevenForums to learn how to use the new GUI (the OS hadn't changed all that much, but finding things was a learning curve for me). After I became more comfortable with Win7, I dove in and rewrote an existing tutorial that had grown long in the tooth (everything was in 1200 comments, but the tut didn't reflect those updates). I'd venture to say that most members joined for a similar reason and stayed because they want to help others solve issues on their computer. The only rewards we get are those pips and the satisfaction of helping another member solve the issue on their machine.
Anyway ... don't like the icons? Change them!
Google search results for Windows icons
but yeah, the current icons are as cartoonish as Microsoft Bob