I Finally beat Doom Eternal on ultra nightmare

This is me, finally beating the icon of sin on Ultra Nightmare. I've had the game for more than a year, but this is my first Doom game, so I really think it was possible to beat the game on ultra nightmare. After I beat Super Gore Nest on ultra nightmare I realized that it was possible to beat the main campaign. I honestly died on the first few levels for while before I started making it to levels like Arc Complex and Taras Nabad. Eventually I made it to final sin, so for the past couple weeks I been grinding to back to that point, I'd play at least one good game a day but I could never get back to final sin. Yesterday I finally made it back to final sin with no saving throw and beat him, and that's what you're seeing. I was honestly really excited that I finally beat him and claimed the golden slayer.