Big shoutout to Robin for going through that pain; I'm miserable even just thinking about EA and Ubisoft's launchers. Maybe it varies from PC to PC, but I find the Xbox app on PC to be the most insufferable of the launchers I occasionally have to use. Game Pass's offer of a substantial library for a fairly low monthly price is obviously very tempting, so I'm willing to persevere, but the Xbox app on PC always seems to find a way to frustrate me.
More often than not, I find I have to restart the app because it doesn't seem to acknowledge any installed games. Also, now whenever I launch the Xbox app, it automatically launches the EA app even if I'm not wanting to play anything EA related (and EA always seems to have logged me out btw) - yay, double the misery! Every time there's an update, the app disappears from my system tray, or the appicon breaks, or both. Also, not sure if it's strictly the app's fault, but trying to join friends or organise parties on games launched through the Xbox app is always janky - "I'm online, can you not see me?", "Hold on, let me restart the game", "I keep getting a connection error" etc.
But to provide a bit of balance, the interface does appear to be becoming more responsive as time goes on - it's no longer a slog to scroll through the full list of games, as it loads the next chunk of games.