Yeah, it is still very early on in development. I am personally a fan of QtCreator, it is very similar to how visual studio used to work regarding ui creation.
GtkMenu, GtkMenuBar, and GtkMenuItem are gone so you have to use GtkPopover* instead which has this issue.
I would love to not use adwaita except gtk4 has crippled the ability for users to theme their apps, especially when libadwaita is used. Also gtk3 does not have this issue even with adwaita.
As for font rendering, it is kinda broken in gtk3 too. I recently switched to roboto condensed and while qt applications look fine the spacing between letters in gtk3 apps is totally broken.
The US took down kickasstorrents and arrested its founder in Poland despite them following the DMCA. You have to suck up the media companies to be allowed to host a service these days.