Bracket 3 Tournament Etiquette, was I wrong?

I recently played in a bracket 3 tournament at my local LGS where all decks had to be at bracket 3 or lower, and the definition for early game 2 card infinite combos was set at turn 7 being the earliest you could play them.

This tournament had an entry fee and prizes on the line, which led me to believe this was going to be a competitive environment, which caused me to create a pretty powerful power level 3 deck that won on average at about turn 5. The deck was fully within the restrictions of the tournament and only has 3 card infinite combos, and 3 game changers with no land denial.

Game one I won turn 5 with a 3 card infinite, after my opponent destroyed three of my lands the turn before. My win caused that player in particular to get pretty upset and call a judge which validated the play. However this player got really upset and according to a friend of mine at the event, did nothing but talk about it at his next table. I didn't think too much of it and put it down to a salty player.

The tournament was a Swiss bracket, so my next game was against the winners of the previous round. One of which had won his last game before I did, though also on turn 5 (earlier turn order). I was jokingly warned from the players on his table that his deck was insane and I sat down to play. We will call this guy "Player B"

I won the game with the same 3 card combo as I did in my first game on turn 5. Player B accused me of using a two card infinite combo to which I explained it was actually three, which upset him further, calling over the same judge which saw what I was doing and once again said it was fine. Player B flipped out and got very angry, getting up and leaving, quitting the entire tournament, and saying to the tournament organiser that he would never play against me again if he ever saw me here, before leaving the LGS.

My question is, am I wrong for assuming that a tournament with money and prizes involved should be taken as competitive? If it was the case that I was clearly a million times stronger than all the other players, I'd accept I misunderstood the vibe of the event and move on, however the two people who got the most upset both did borderline mass land denial, as well as won on the same turn I won my games on, causing me to feel incredibly conflicted.

What do you guys think?