Yeah I've always felt like Arcane Trickster is cool flavor wise but in game it just sucks. I assume when you do get second levels it picks up tremendously, though even then using your own action to setup sneak attacks isn't worth it either, for general skullduggery those spells will be a massive boon at least.
Idk about the gpu screen recorder but for the keychain for Discord if you disable the KDE wallet subsystem (which is just in the kde system settings) it should stop asking. it’s never caused me an issue and made the discord popup go away. its a dirty solution but its what worked for me.