ColdWKey felt like only real reply... so to add on... I agree with what he said. Everyone's expectations were higher on NAVI and fans are disappointed (+typical toxic nolifez having something to bash on).
They started really good and had a good outlook from Lock-In. But then they lost to KOI. And since then, although they've won every game in the series after except for Fnatic, all the games they won tended to be somewhat close. They even went close against the infamous Karmine Corp... then they proceed to barely qualify into masters. To add onto their more recent games, they picked split against Team Liquid who is good on Split (though not the best) and NAVI who have little experience and have a worser record on Split. +2.33 round differential for TL and -2.0 for NAVI. That's a full 4 rounds which is big in round differential stats. But a bigger disappointment might've been losing Ascent against NRG who are not good on it, and same with Fracture against FUT who was also pretty bad on that map, yet they still lost when they were favored by around +3 for both of these matches on the maps.
I personally was not surprised NAVI dropped out of masters in group stages. But I think they will qualify to champions, especially with Vitality dropping out due to twisten's suicide. Though I can see a future of them losing to Giants and not qualifying to the actual championship playoffs like Tokyo Master's situation unless they get an easier bracket such as a lower rank China team (as in not EDG) and LOUD as the championship in their group (Assuming if Champs do also start in group stages as I don't remember). As for not qualifying to Champs, only way I possibly see them losing is to BBL in bottom brackets if they lose to Giants in upper finals. Which will probably be BBL barely winning Ascent and managing to do an upset in deciders which will probably be split or bind.