stuck on asus logo, recovery mode won't work, adb won't recognize...

alright, so this is a string of multiple problems which may seem like there is an obvious answer, but it has lead to me wanting to pull my hair out for days now. i have an asus zenfone 2- the 2gig Z00A, ZE155ML model.

i had cm13 installed, and it worked great. one day my data stops working but i can call and text, and i learn it may be b/c of cm13, so i try to go and flash the stock rom to see if this fixed it. however, i have TWRP, so it wouldn't let me just flash the stock rom. i tried to sideload it but whenever i went to the sideload part in twrp on my phone, my device wasn't considered being plugged in on my PC- as in, i exit out of sideload, and then it was recognized.

i tried then to flash the images separately in fastboot, however, it says the access was denied and i couldn't go back to stock recovery. then i wiped my data through TWRP, and i tried to start fresh again (with CM13 obviously) and now i am stuck on the white asus screen when i try to reboot my phone (unlocked bootloader) and trying to boot into recovery yields an "updating system... error!" and won't let me access recovery, even after reinstalling TWRP.

now i can't do anything with adb, the phone won't be recognized by my computer when i directly boot to bootloader, and it's bricked (i left it charging,all night, and it was still on the white asus screen)

...so does anyone know what i can do here, or am i royally screwed??

edit i also posted this in the zenfone 2 subreddit to see if anyone else with my phone has this issue.