help, i failed to root samsung s8+ (sm-g955f) - Samsung Galaxy S8 Questions and Answers

recently my phone have been acting strange, android 7.0 with samsung-something 8.1 so i thought i should root it and then update it. - bad idea..
So, i found a old root guide for 7.0
youtube.com/watch?v=-nveQWZlnOI
did a backup of my stuff, then downloaded odin3_v3.12.3 and twrp-3.1.1-0-dreamlte.img.tar, activated the dev-menu and turned on the oem-unlock
did volume down, home, power, run odin, but i acceidently inserted twrp-3.1.0-1-dreamlte.img.tar
the os restarted, everything was wiped, felt ok. I wanted to fix the issue i did, so i did the same thing again but forgot the oem-unlock.
i went odin mode with twrp-3.1.1-0-dreamlte.img.tar and got stuck in "samsung s8+ logo" after...
tried volume up, home, power but nothing....
tried turn off the phone, but it restarts and got stuck on samsung s8+ logo...
tried drain the battery, it worked but it still stucks on samsung s8+ logo....
tried go into "odin mode" it works.
when i running odin, i get "fail" and phone turns off, and go back to "samsung s8+ logo"
im not sure what i can do now.
and suggestions would be appreciated...

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I have a SM-G930V Verizon S7 that previously was in bootloop with OREO, but constantly rebooted at the beginning of the setup I mean when it says hello and so on.
I flashed Nougat without problems and booted normaly but then the FRP was doing his work, I could not boot since I didnt know the email or password.
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After a while when I tried to clean bloatware suddenly frozen and then never booted again, I wanted to root but couldn´t.
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I don´t have any new ideas my head is full and hot now. PLEASE HELP will be appreciated.

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