Did you try these searches while logged in or anonymously? Lemmy (and probably other platforms) don’t allow searches for remote objects unless you’re logged in, this prevents abuse of server resources. The fact that you’re getting replies and you can see them and reply to them means it’s probably all working fine.
He called Git simple lol. Some good points here though. GIMP is definitely a bit clunky. Kdenlive does crash a lot for me, and often fails to recover the autosave, and it renders slowly. But there’s a lot of other good open source programs too. Firefox, OBS, Blender, some people in the comments were saying Krita but I haven’t tried it yet. There’s also Chromium and VSCode but obviously those are backed by huge companies.