Can you use the menu to get back to fastboot ? That will be the starting position for your next move.
We don’t know it is really bricked, the recovery is still probably original and system is compromised. So put simply those two booting methods are out of use. It is all down to getting back to fastboot.
Just so you know e-recovery, when you flash it successfully will look like images on this thread [HOWTO] use e-Recovery to wipe & format data before sideloading/install eOS
The point of failure is likely the point where you have to
Now reboot into recovery to verify the installation:
- With the device powered off
- hold Volume Down + Power
This instruction is unhelpful for first timers. If you allow the phone to do a standard shutdown then reboot to recovery on most / many phones the new, Custom recovery will be wiped; the phone seems to try to preserve the original.
You need to try something like, leave fastboot mode with Volume Down + Power, then as the screen goes black you lift your fingers from the keys for a moment, press again, and relax after a few seconds or a vibrate.
If you don’t see e-Recovery you try again, maybe you find the key presses a slight variation on the above (which seems correct for OnePlus One).