Moto E XT1022 Downgrade to Kitkat Issue
If you really want to downgrade your moto e to Kitkat. Then there are two option, one is install stock kitkat rom by this method and another one is flash a custom recovery like CWM or TWRP in your phone and then flash a zip distribution of a ROM that you like. But i'll recommend to follow second option because if you go for first option, then as you already mentioned that your current OS is Lollipop which updates the bootloader accordingly and if you go for kitkat then the bootloader may cause problem not always but there are chances and I have bricked my phone this way.Assuming you have moto e first gen. follow this link to install TWRP custom recovery.You can find your phone's flashable firmware from here. Do it with caution, hope you get your phone alive again.