Using Better Internet Tiles with Shizuku is a bit inconvenient, since you have to re-enable Shizuku every time you reboot, but it definitely is a solution.
In total, this will greatly reduce the amount of taps and swipes you would have to make. It allows you to have quick settings tiles that disable or enable wifi or mobile data with one tap. After the initial setup, starting Shizuku after reboots does not take that much effort following these steps:
- Make sure you are connected to wifi.
- Enable wireless debugging with a quick settings tile. (Developer options > Quick settings developer tiles > Wireless debugging)
- Open Shizuku and tap start.