Before you say it's 100% not the mouse - have you checked with a different mouse? It may be problems on any part of this interface, but you know, simple elimination.
alr imma check with a different mouse
forgot to test it, now i did and yep its kde, how do i fix it
I have not had those issues but for some reason gnome does handle my trackpad right clicks and such better than kde although I think kde is better about not interpreting a right click as a left click
KDE
KDE is an international technology team creating user-friendly free and open source software for desktop and portable computing. KDE’s software runs on GNU/Linux, BSD and other operating systems, including Windows.
Plasma 6 Bugs
If you encounter a bug, proceed to https://bugs.kde.org/, check whether it has been reported.
If it hasn't, report it yourself.
PLEASE THINK CAREFULLY BEFORE POSTING HERE.
Developers do not look for reports on social media, so they will not see it and all it does is clutter up the feed.