I guess you are purposefully trolling instead of really being clueless to such extents you are presenting. I am also trusting you do know what the word “malware” means, instead of being so ignorant as you sound like.
Considering that I see no real point in explaining to you why custom ROMs and rooted devices exist, why they often not just useful but absolutely required and cannot be simply “unrooted” without making the device useless for many (tough not all) “intents and pusposes”.
But I am kind of sure you are not aware that most banks (and I mean proper banks, not just the weird revolut kinds) have their applications run under custom devices and they usually fire a big warning at you, or require you to accept some auxilary terms, mostly covering the risks considering such a device. But, mind you, a non-rooted device is no really less harm than a properly rooted and used device.
Disabling the app without warning is, regardless of your or Revolut’s beliefs extremely rude and counter-productive.
In my case, as you may have guessed it is not a question of whether I want to unroot or not, it’s simply uninstalling revolut app since it doesn’t work and move on to a different provider (or my actual bank, for that matter).