I agree but this isn't the first season we have had to put up with injuries to our best players. We have done so over the last 3 or 4 seasons.
We won the league in 11/12 with one of our best players on strike all seasons. And over the next 3 seasons we have had constant injuries to our best players, yet our performances have never dipped to the shambolic levels of this season.
The warning signs have been there for the best part of a year now. Even during our run of 9 in a row last season I was still scratching my head wondering how we were winning games because we had been awful. And not long after, the Burnley and Boro performances were pretty much the start of what we are seeing now.
So with that in mind, and the fact that every man and his dog knows how injury prone our best players are, to not strengthen certain areas over the summer is 100% our own fault. We all knew relying on Aguero was a risk, we all knew the centre of midfield was low on quality and we all knew left back was a problem, yet all we did was spend £100m on two attacking midfielders. Being honest I'm yet to see proof that either actually make us a better team.
So yeah we have been unlucky but we have also been utterly careless in our planning. Funnily enough, that could also be said about our pre match planning.