Perhaps booting your phone into “Safe Mode” and then performing a full factory reset may help.
1) Turn your phone on. Hold down the phone’s Power button until the Power Menu appears.
2) Instead of just tapping '''Restart''', hold this option down until your phone reboots.
3) Hopefully, your phone will now boot to a readable screen. If so, you can now go to the phone’s Settings and perform a full factory reset.