I’m really sorry you’re having so much trouble since the operating system update.
On your phone if you go to Settings
Tap on Backup & Reset
Is Back up my data turned on?
Is Automatic Restore turned on?
If they were turned on, your networks should still be available.
First I would suggest clearing the Android System Cache/Partition. It’s possible there isn’t sufficient room on your phone to recall the saved network settings. This will take about 20 minutes to complete and it will not erase any of your personal information:
For your convenience:
The following info refers to the Moto E (1st Gen.), Moto X (1st and 2nd Gen.), and Moto G (1st Gen.) phones only.
A. Turn off your phone and remove any charging cables.
B. With the phone off, press and hold both the Volume Down and Power buttons at the same time for 2-3 seconds, then release both buttons.
C. The phone will display different options. Use the Volume Down button to scroll through the options to “Recovery” and press the Volume Up button to select it.
D. The phone will display the Motorola logo, then the Android figure lying down with an exclamation point with the words “No Command” underneath. Press and hold the Power button and tap the Volume Up button.
Note: If you wait too long to perform this step, the phone will reboot and you'll need to start the process again.
E. The phone will display additional menu options. Use the Volume Down button to scroll to “Wipe cache partition” and press the Power button to select it. The cache wipe will begin immediately.
F. After the Cache Wipe is complete, the menu items will reappear, with “Reboot system now” highlighted. Press the Power button to select it. Your phone will restart.
Once this is completed, go to Setting on your phone
Tap on WiFi
Tap on the 3 dots in the upper right corner
Tap on Saved Networks
Are your networks there?