Or don't listen to them & stick with 7.
7 is fine, 10 is too; Vista & 8/8.1 you should avoid like the plague
As for changing the image I thought MS put a lockdown on that? maybee not? I can't help as I've never had the want/need to change it
Oh & I guess if customisation is your thing then it's prob best to stick with 7, Win10 is one of the most locked down OS's on the market
8 and 8.1 were amazing OSes. Steven Sinofsky had Great ideas, it's just that they weren't able to be fully followed through, which is why we got what we did with 10, unfortunately. They had the chance to start over, can legacy and the registry and other ills of the system, and have a well curated walled garden just like Apple's, but they let the Windows store go to ruin and never provided much content of their own to help that out.
Vista was also fantastic, especially after SP1. Its problem was being forced to run on systems that were not ready for it, and in people's minds it was also often combined with the Office switch to ribbon menus, which confused many. In terms of functionality, it was right up there. Vista and 8 were exciting to use, much like Mac OS X before the switch to Intel, at which point it started taking too much control away from the user. Windows 10 is still unsure of what it wants to be, but sadly I think we're not going to get what 8 should have become.
You Sir are very unique in your opinion, even MS themselves would rather forget & distance themselves from Vista & 8/8.1