Tried reverting back to Windows... now I can’t install any OS on my laptop.

I had macOS Catalina on my Xiaomi Mi Notebook Pro i5-8250U, after a few weeks of dealing with terrible battery life and it lagging from time to time I decided to revert back to Windows 10 and... the installation, it failed and now I can’t boot or install any OS and I’m panicking! What did I do wrong here?

Please I genuinely need some help!!!

submitted by /u/RookieBambooXJ9
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