No team in the history of football or any other sport has done that. The Invincibles definitely didn't, they often blitzed teams in the first half and then coasted through the rest. It is just not physically or mentally possible to play at the very top intensity for every minute of every game. And when you're playing a poor side you don't always need to give everything, you play within yourselves and save some energy for bigger tests. So long as you get the result.
We're top of the league and in the last 16 of the CL. So far, so good.
You were confidently agreeing that, when we were 5 points off the top after 4 games, we'd 'definitely' be 10 points off in another 4 games, and you declared us out of the CL after 2 (admittedly awful) games. Now we're you're just shifting the goalposts and complaining about different things. Had we lost people would be saying we spurned another chance to go top and Wenger out and. We won, went top and all you can do is moan we didn't win well enough? Sheesh, give it a rest.
While we're in the title race I'll believe we have a chance of winning it. If we fall out of it then we can look at other management options. For now we're top, the next trick is to stay there or close enough that we have a good chance of being there in May.