Need help! Super soft Bricked stock phone. Tried many methods!

Hi all. So my stock opo somehow got bricked overnight while charging. It's completely stock and I have no idea why.

Status of my problem:
-Stuck on Android boot screen.
-Able to access fastboot.
-Can't access recovery mode
-No TRWP
-it's still locked
*USB debugging not enabled
-Cm11 33r I think...
-Installed android adb on device manager
But couldn't detect it on the list ("adb devices" cmd)
-Able to detect serial using fastboot device cmd tho.
-Tried universal adp, adb bootloader driver, Samsung adb driver, composite driver and it still won't detect it on list.
-Tried using another usb port.
-computer doesn't detect phone unless I go on fastboot or hold power+up volume for 10 sec (this shows QHUSB_BULK)
-Tried using msm9874downloadtool.exe, doesn't do anything even tho it's completed and it's green.
-Tried just flashing Cm11 33r images but it won't work cuz I'm locked.
-Tried unlocking but goes back to my other problem of device not being on the list.

Thanks for your time and effort. I really need help.