[Xiaomi Mi Mix 3 Themes, Apps, and Mods] JanyV50:
Hi,

I made simple script that removes bunch of bloatware apps.

Flashable via TWRP, check if system is mounted.

List of apps:
delete_recursive("/system_root/system/app/AnalyticsCore");
delete_recursive("/system_root/system/app/MiPicks");
delete_recursive("/system_root/system/app/TouchAssistant");
delete_recursive("/system_root/system/app/BookmarkProvider");
delete_recursive("/system_root/system/app/CatchLog");
delete_recursive("/system_root/system/app/CloudService");
delete_recursive("/system_root/system/app/Chrome");
delete_recursive("/system_root/system/app/Duo");
delete_recursive("/system_root/system/app/Drive");
delete_recursive("/system_root/system/app/facebook-appmanager");
delete_recursive("/system_root/system/app/Videos");
delete_recursive("/system_root/system/app/Gmail2");
delete_recursive("/system_root/system/app/HybridAccessory");
delete_recursive("/system_root/system/app/GlobalPackageInstaller");
delete_recursive("/system_root/system/app/Joyose");
delete_recursive("/system_root/system/app/MiuiCompass");
delete_recursive("/system_root/system/app/XiaomiAccount");
delete_recursive("/system_root/system/app/Lens");
delete_recursive("/system_root/system/app/Maps");
delete_recursive("/system_root/system/app/FileExplorerGlobal");
delete_recursive("/system_root/system/app/PaymentService");
delete_recursive("/system_root/system/app/IdMipay");
delete_recursive("/system_root/system/app/InMipay");
delete_recursive("/system_root/system/app/MiuiVideoPlayer");
delete_recursive("/system_root/system/app/MiCloudSync");
delete_recursive("/system_root/system/app/MiuiDaemon");
delete_recursive("/system_root/system/app/Music2");
delete_recursive("/system_root/system/app/Notes");
delete_recursive("/system_root/system/app/BugReport");
delete_recursive("/system_root/system/app/Netflix_activation");
delete_recursive("/system_root/system/app/HybridPlatform");
delete_recursive("/system_root/system/app/MiLinkService");
delete_recursive("/system_root/system/app/XiaomiSimActivateService");
delete_recursive("/system_root/system/app/XiaomiServiceFramework");
delete_recursive("/system_root/system/app/VsimCore");
delete_recursive("/system_root/system/app/YouTube");
delete_recursive("/system_root/system/app/Photos");
delete_recursive("/system_root/system/app/PartnerBookmarksProvider");
delete_recursive("/system_root/system/app/MiWallpaper");
delete_recursive("/system_root/system/app/SmsExtra");
delete_recursive("/system_root/system/app/KSICibaEngine");
delete_recursive("/system_root/system/app/XMCloudEngine");
delete_recursive("/system_root/system/app/YouDaoEngine");
delete_recursive("/system_root/system/app/TranslationService");
delete_recursive("/system_root/system/app/MSA-Global");
delete_recursive("/system_root/system/priv-app/CloudServiceSysbase");
delete_recursive("/system_root/system/priv-app/facebook-installer");
delete_recursive("/system_root/system/priv-app/facebook-services");
delete_recursive("/system_root/system/priv-app/GameCenterGlobal");
delete_recursive("/system_root/system/priv-app/Velvet");
delete_recursive("/system_root/system/priv-app/Calendar");
delete_recursive("/system_root/system/priv-app/CloudBackup");
delete_recursive("/system_root/system/priv-app/Backup");
delete_recursive("/system_root/system/priv-app/YellowPage");
delete_recursive("/system_root/system/priv-app/GoogleFeedback");
delete_recursive("/system_root/system/priv-app/MiDrop");
delete_recursive("/system_root/system/priv-app/MiRecycle");
delete_recursive("/system_root/system/priv-app/MiWebView");
delete_recursive("/system_root/system/priv-app/Music");
delete_recursive("/system_root/system/priv-app/PersonalAssistantGlobal");
delete_recursive("/system_root/system/priv-app/DownloadProviderUi");
delete_recursive("/system_root/system/priv-app/MiuiBrowserGlobal");
delete_recursive("/system_root/system/priv-app/MiuiScanner");
delete_recursive("/system_root/system/priv-app/GlobalUserGuide");
delete_recursive("/system_root/system/priv-app/MiuiFreeformService");
delete_recursive("/system_root/system/priv-app/SetupWizard");

If you have any suggestions or know any other apps that can be removed, let me know :)

Tested on Miui Global 10.3.3 (PEEMIXM). Use after initial setup!