So for an average user like me, who really doesn’t have any problem with Windows…why switch?

Well, because Micro$oft can't accept that people don't want to use their garbage browser and desperately does everything like a crazy ex to get you back to use Micro$oft Edge. They also collect all of your data and sell it to whoever pays the most and. On a Windows system, you don't control the computer, the computer controls you. And they don't allow you to uninstall any of their spyware, if you uninstall Edge and perform a Windows update, guess what's gonna be back on your computer. Microsoft Edge is like a virus, it does everything to prevent you from getting rid of it. Edge, Windows or any Microsoft product is just corporate data mining malware.
Linux is the exact opposite of that, it's a tool meant to empower users to take back their freedom and take back the control over their computers. It allows you to do everything the way you want to, not the way a mega corporation wants you to do it. Data collection practically non-existent, just like corporate influence. You are the one in charge of your computer, you decide what it does, you decide which programs are installed and what services you choose what services you want to use. Linux gives you freedom, whereas Windows gives you ads for Candy Crush in your start menu and a browser that ~~behaves like~~ is malware.

Back then I tried probably 5 or 6 different Linux variants.

Linux from 15-20 years ago can't be compared to modern Linux. Take another shot at it, try out modern distributions like Linux Mint or Fedora, I promise you, it's much much better than in the 00s.