There are a few key things I would argue you're missing out on:
- Up to date software: Mint is pretty out of date and the desktop is severely oudated
- A modern interface built on modern software: Specifically im referring to Wayland (which effects multiple monitor setups, VRR, gestures, HDR, and scaling)
- Functionality: Following Windows in terms of functionality is a massive limitation, it holds back what could be to what already is. KDE and Gnome are implementing runners (search based application launcher), gestures, widgets, extensions, and advanced shortcuts (cosmic even has tiling).
- Design philosophy: Windows is absolutely not the pinnacle of good design and Cinnamon takes it to the next step by looking like Windows 7 but with XP level blurry icons. Once again its clearly they're restricted not just by Microsoft standards but outdated Microsoft standards.