Okular can handle basically everything for me, except for those Adobe-proprietary ones that require JS and all kinds of other dumb features that only Acrobat supports.
I recently made the switch to gnome as the multi-monitor support, fractional scaling and general Wayland support is only excelled by sway. I sorely miss Okular!
Can't you still run KDE apps under Gnome, even with Wayland? I use a few. Some of them look better with the "QT_QPA_PLATFORM=wayland" environment variable.
Most KDE apps work not just under Gnome, but even under gasp Windows! I think Okular and some others are even in the MS app store.
Okular should work fine on GNOME, but you might need extra disk space for all the KDE dependencies.
Thats the point. Apps which only use QT like keepassx are ok but Okular would swap in half of KDE.
I just use Libreoffice Draw to add text into stubborn pdfs on windows and any on Linux. It's a good, free OSS way to get the job done, though not pretty.
I very rarely have any issues using evince. What PDF viewer are you using?
I purchased PDF Studio Pro and it works pretty well for me.