[Nintendo Switch News, Guides, Discussion , Develop] Count_NOOBula:
The simplest app based method

...try one of the MANY 'free' apps on the play store. Many work. Many cause bootloops. I've stopped caring about this method because:

1) often times, the app is android version specific. Meaning an app to remove buttons from android 7.1 may cause bootloops if installed on 8.1. So if a lazy dev doesn't update their app for your OS, you're screwed without a twrp backup.

2) even if the app works, it works by constantly running a part of the app in the background (called a service) and devs get the same data most devs get when you run their apps in background (your clipbosrd, location, call logs, messages, storage, certsin things you do in different apps you do in different apps (using broadcast recievers), network data (sites you visit <<, why the frick would a navbar app need this?). This service uses a bit of precious ram, but often times a creepy dev runs a cryptomining service in the background to monitize their "free" app, causing your device to overheat, slowing everything else down and screwing your battery. Not all apps abuse these permissions of are poorly designed but unfortunately MANY do. So avoid them unless you're recommended a few specific ones.

The simplest non app method

...reduce your "display size" by searching for this option in Settings. This will make the icons smaller & also move them close together. It changes the DPI without touching your resolution to achieve this effect, also giving your more screen real estate in return.

Or you can "autohide" the navbar buttons

...search for a switch for "expanded desktop" in Settings.

........ perfect for 720p, if you've set that up

.........works like auto hide taskbar in windows.

........you also autohide them for specific apps

........swipe from the bottom or top to "reveal" the buttons. You can also "hide" the status bar for even more immersion and screen real estate.

My method

..Because Google has moved on from these "nav bar buttons" in favor of "gesture UI" in Android 9 and 10, I use an amazing free, EXTREMELY LIGHTWEIGHT, xposd module called Xposd Edge. It let's you assign COUNTLESS things (apps, shortcuts to certain things IN apps, settings etc) to simple AF gestures you pick from a list.

...I've set up a quick tap and hold the bottom left & right edged of the screen to automatically hide/show status bar & nav bar, respectively.

..by also enabling expanded desktop, I've made the navbar obsolete by assigning tap and hold the MIDDLE edge or both edges of the screen to enter the RECENT APPS (left most nav bar button) and a quick swipe left from the top right edge and right from the top left edge to emulate the back button (super convenient despite how complicated this sentence looks)

..I've also set up gestures for night filter, a memory clipboard built into xposd to recall the last 100 things I copied/cut; swipes up from the bottom edges to RAPIDLY scroll to the top or bottom of a long page; tapping and holding, double tapping or swiping different parts of the screen to launch different apps and many other button based shortcuts you can set in this app

I'm sorry you're having touch screen response issues. Many of the options in developer options are switches for manual text based commands devs input on their computers to turn something on or off (using the command line on Windows, for instance). If you can't restore a backup from TWRP or didn't create one, you can ask a general question here on XDA and I'm sure someone could tell you a manual command to enter via your PC to undo you developer options problem. That said, manually undoing typically requires being able to plug a phone or tablet (in this case our Switch) into the computer. But since our current android build doesn't support "USB Debugging" (another developer option), undoing manually may be difficult or even impossible. Obvious worst case scenario: you'll have to reformat your card and install android from scratch. That's why most ppl recommend twrp backups almost every time a user changes or modifies any system setting.

Good Luck and thanks for the VERY USEFUL battery saving tips. These kinds of apps are ESSENTIAL til we get a Beta2 from Switchroot.