Dude literally said

Next up, I plan to start reading about more room treatment to try to get the most out of this setup

So, based on your message, this is something to consider?

That’s a pretty brutal room. Some treatment would likely go a long ways.

Not trying to be contentious, I'm just genuinely curious how some people think their messages will be read or if they just want to say something to say something.

Alternatively, this:

Move the couch up like 4 feet, get some surround back speakers to make a 7.1.4

Your TV isnt big enough to sit that far back

The added speaker suggestion is good, however, viewing distances are HIGHLY subjective, so stating that someone's setup is "wrong" is awfully presumptuous.