99.99% of the time when someone says "I could have done a better job" than a professional its gross exaggeration. The professional might have messed up or under performed but saying that some rando with no experience can do better is usually nonsense.
But there are exceptions. I legitimately believe if you gave some nerdy fanboy a pen and paper he could have crafted a better version of the star wars prequels. That's not to say he could do it without the foundation already there, but in that moment the end results were so bad that I honestly can't say that there is not massive room for improvement, even if its just by accident.
I think if any knowledgeable fan had taken over AV's brain, just against Ottawa, there's a decent chance we might have won the series. Its not like AV is known for motivational speeches, timely time outs or in game adjustments anyway. You would literally just have to play the best players more and not play a few players in the last few minutes of the game. That's what separates AV from most coaches and causes such ire among fans. Basically, the 2017 Ottawa series is the star wars prequels of coaching. And AV never seemed to acknowledge things were going poorly. Him putting Glass out there at the end of the game, a place even his biggest fans would admit he never belongs, was such a stubborn F YOU to everyone that I am almost in awe by it.