Your post is a lot more interesting that it appears at first glance.
You're obviously right, that the numerical evidence suggests its our defence that is weak.
But the 'we need better forwards' are also right, since we failed to convert so much possession in the final third (which we over-rely on, since we're playing 'fuck it, let's outscore them' football).
And it's hard to argue that our coaching, strategy and tactics aren't in need of optimisation, since we lost games we should have one and didn't seem to learn from many mistakes in our own third (e.g. corners).
So, everybody's right. We need better everything.
Joking aside, the truth must be somewhere in between, so let's take it literally!
Get two world-class CMs in.