1st RANKED Game and get MISS FORTUNE and one shot anyone near me! Trying only FILL in ranked!

We are playing our first game in ranked, and i am trying to win with only filling. We get Adc and choose Miss Fortune and dominate with the help of a cray Pyke support! We literally one shot with the lethality build.
Recording didnt come out well, maybe the new riot vanguard was slowing it down, and it felt shaky playing.
0:00 Queueing up
5:45 Game starting
13:53 nice early kill
14:30 Quick thinking 1v4 kill
15:50 Starting to snowball
18:00 ONE SHOTTING ULT - BRUTAL
18:55 STRANGE KILL - First Strike into Collector kill out of nowhere
23:55 Snowball achieved with some ridiculous damage!
28:15 GG and after game analysis