BTW, look into Syncthing (file sync), Wekan (kanban), Vikunja (kanban), and Matrix/Element (instead of Nextcloud Talk). All available on Cloudron.
I certainly agree that Nextcloud can get bloated and even unstable when too many plugins are enabled. I use it heavily for file storage and shared folders, but for almost nothing outside of this.
And definitely the other apps are worth exploring.