I’m not trying to convince you to like something you don’t, and KDE is a fucking great suite of software.
However, it does sound like maybe you haven’t used GNOME in quite a long time. It does have various customizations built in that are available to users through the settings UI these days, and “tweaks that barely work” isn’t really a representative critique of the general ecosystem anymore.
GNOME’s extension platform is very mature at this point, and I’ve personally used a bunch of the same extensions for years now spanning like 10 major releases of GNOME without issue. Yeah, the little fly-by-night extensions that get two point releases and then are abandoned don’t work forever, but that’s true of a lot of old software, and is probably a good thing, honestly.








Most of the paid plugins I’ve messed with have code to phone home and prevent operation if there’s not a paid license of some sort.
However, before you bother trying to put effort into pirating those, I recommend making certain that what you want isn’t already freely available a different way. Many paid plugins have decent open source and free alternative plugin(s) that can be used instead. You just have to look hard enough in the plugin listing. The WordPress ecosystem is vast, but there are a ton of smarmy assholes charging monthly subscriptions for plugins that replicate features provided by free plugins and hoping you won’t notice.