Okay, a balanced reply to this post.
The first two points are from the season before last. Laudrup wasn't sacked for poor performance across 18 months. He was sacked for poor performance in the 2013/2014 season alone.
Additionally, you say that Monk led us to our lowest position. But actually Monk accumulated more points per game and his team scored more goals per game than Laudrup's team in both the 2012/2013 and 2013/2014 seasons. On Monk's points per game ratio, we'd have finished on 49 points.
We call our European adventure successful, but we were lucky to get through that group. We smashed Valencia (a team well documented in Spain to have been a mess under a new manager at the start of the season. Like us, their league position stabilised after the sacking of their manager, but still finished their lowest ever placing in La Liga). But then struggled against the other teams in our group that we should have swiped aside, that the poor man's Valencia that we beat were swiping aside. A record of W2, D2, L2 would not normally progress through a European group. But thankfully for us, it did!
At the time of Laudrup's sacking, his last 10 league games boasted a record of W1, D3, L6. Our goal difference was -7 through those games. We dropped points to Aston Villa, Norwich, Hull and West Ham in those games. We can blame the injuries, but that's too simplistic. It's not been confirmed or proven otherwise that Laudrup's training (or lack of) was causing the players to be more unfit and pick up injuries. We don't know that if Laudrup had stayed in charge, whether the injuries would have ever cleared up. We can blame a small squad, but Laudrup only wanted 2 senior players per position.
All we know is that Laudrup was sacked. Monk took over. We survived. We go again next season. Fingers crossed we keep who we want to keep and buy some beauties.