I don't think it's debatable, the length is exactly what matters here. You can sit through one game and easily decide who is the Man of the Match, but it's pretty much impossible to sit through every single match of the season, or even only matches of players that would be nominated for the award, and then make a decision with every single performance appreciated in full.
So for that reason MVP of a tournament is comparable to a season-award in football.
And the different awards are exactly my point here, if Nico was named fans' player of the event, or most surprising performance, or even Best AWP, it would make more sense.
But MVP should be THE standout player of the event, not the most skilled one, or the one who played above expectations, or the one with the best highlight rounds, or the one whose team surprised the most, but the one whose amazing consistent performances helped his team reach something significant.
So in this case, saying Nico is the MVP just isn't based on any such facts. And I know that in actuality it's just based on user votes, nothing against Cadred here, just debating people who are defending the choice of him being the actual MVP. And it definitely has nothing to do with who is a former CS:S player, I think we're all by now used to considering everyone simply CS:GO players.
Bottom line, Nico's best performances came in the group stage, while in the playoffs he was just a part of a machinery that played well as a team, with different players standing out at different points, so I can't see him being the MVP in any way. Maybe MVP of his team, but even that is debatable, but definitely not of the entire tournament.
And same as lurppis said above, no disrespect to Nico, I actually consider him one of the best AWPs in the game atm and I love his style, it sucks that this debate is belittling his play in a way.