(The info below is during reykjavick and 3 months before the event).
Yay was on sandbox and would diff sentinels everytime he played them.
Loud wasn't even a thing then unless u count vikings but you can't really compare them since they only played 1 game.
Sentinels would often to lose to 100t so not sure what ur on about with that one.
Sentinels had close games with c9 even tho c9 was a very mid team.
FNC was always so close when they played sentinels and lost by 2 rounds every time.
FNC and 100t could definitely touch them and this is displayed after the event as envy, xset, g2, liquid and kru would beat them a few months after their spectacular run and then lose to super mid and bad teams after.
Its hard to say but sentinels run was definitely a fluke run as they have had nowhere close to the success that they found in early 2021. The reason for this is simply that teams got better and understood more how the game works whereas sentinels did not improve and stayed in their 2021 Reykjavik form.