People doing the 30 days linux Challenge are having several problems because of Mint's old packages and technology. Why people still recommend it when there is Fedora and Opensuse with KDE and Gnome?
Wayland has objectively better multi monitor support in every case. You were encountering tearing issues before switching, maybe you just didn't notice.
the rest also isn't just an opinion, cinnamon does not have an equivalent to kdenlive, krita, or kate. even the existing applications are just not on the same level. it's an acceptable desktop, but plasma and gnome are just better.
Why would I care what software KDE comes with? This is Linux. I can install whatever works best for me. Including the whole of KDE software suite if I so chose. You KDE fans are voracious.
I use KdenLive on Mint whenever I need to edit a video. I've never bothered to look for the other two because I use Darktable and GIMP for my photo editing, but I can check to see if they're available if you want me to.