That doesn't look like the High Sierra Disk Utility... Are you sure you're using the latest version of the High Sierra installer? If not, you can just use to "Download macOS High Sierra" option in the Tools menu of the tool to download the latest version. Also, in the boot menu, the volume should be named "<High Sierra APFS Volume Name>_BOOT". It may also just show up as "EFI Boot".
I booted to working Sierra partition. Thats how it looks. Yeah, I downloaded the latest version 2 hrs ago. Damn, there was EFI Boot partition but Its gone now lol. I reformatted the partition to start over.
He's probably booted into working Sierra or something, since he can't boot into HS.
@Brale There's a "High Sierra_BOOT" visible on your screenshot - that's the HFS+ helper partition that handles booting into an APFS volume, so it looks like the patcher did what it should.
Try going into Startup Disk in System Preferences and see if you can see "High Sierra_BOOT" there. If you can, select it as the startup disk and reboot (or select it and click Restart).
I'm not sure but I guess it was working fine. The problem was that I was looking for High Sierra partition to boot from. I should have tried to boot from EFI partition.