It's not good. You need some room behind your listening position just like you need it behind and to the sides of your speakers.
Furthermore, most setups with great soundstage/ imaging follow the equilateral triangle rule.
Say your speakers are 8' apart.. You ideally want to be 8' from each speaker and with most, some toe in helps as well.
Try putting a chair in the room, equilateral to your speakers to get an idea of what I'm explaining.
With your listening position so far back and against the wall, most of what is heard is reflected sound, making for a far less than pleasant listening experience.
Cheers, Mac