Richarlison has been missing a fair chunk of the season.
To visualise it, here's what's missing for Brentford, and a large chunk has been missing for a while now.
View attachment 146678
That's literally our first choice midfield and attack. I've deliberately left off Gomes, Davies and Holgate just to make that point, but even then you have to consider they still have a role and it'd mean Simms, Branthwaite and Onyango weren't clogging up the bench years before they're ready, if they ever will be.
Your point that we don't have a defensive crisis is a misnomer. Setting aside Mina being our best centre half, the problem is our midfield and attack are now so abject that we can't get up the pitch. Not won't, can't. Rondon has been a dud and is finished and even when Richarlison has played he can't play up front on his own and has proven it over and over again. So the ball keeps coming back at us. Defending is a team game just as attacking is - you can't get your full backs flying up the wings if you're relying on the Iwobis of this world plugging gaps, as you get exposed.
We simply can't cope with those losses - we're not Man City. There's no Mahrez etc. to replace a De Bruyne, so the drop off is minimal; no, we go from Doucoure to Tom Davies, from Gray to Iwobi. It's can't be glossed over and explained away; the truth is obvious - no manager in world football could get consistent results with what we have available.
Could another manager be on, I dunno, three or four more points now? Maybe, but they'd be working absolute miracles to do so. And that's why I don't get the Benitez abuse, or rather I do get it but I find it bloody ridiculous.