Calling teams flukes is stupid. Sometimes things click and a team makes a deep run, and then never is able to repeat that performance. Calling them a fluke implies that they were never good when in fact, they WERE very good, but then something changed afterwards (either other teams got better, players developed personal problems with each other, etc, etc). In a game as new as Valorant we will see MANY "flukes" (especially since there's so few tournaments and qualification is so difficult), but that doesn't mean those teams were undeserving of their placements and shouldn't be respected for their great runs. Obviously a consistent top team is better than another that made it once, but we haven't ever had a consistent top team internationally (with maybe the exception of Gambit from last year).
TLDR: It's stupid to call teams flukes and belittle them for it; they deserved their wins.