I think the beam will be more or less OK. It’s too close to your head to reflect directly, but the ceiling above your head is ripe for treatment.
One radical listening approach is to toe the speakers in so they cross in front of your head. This minimizes the reflection against the side walls. They also seem to be too far out into the room to reinforce the bass well though, so, with an eye on the AM room simulator, consider pushing them backwards when you have that back wall treated.
Honestly though I'd move the speakers AND the couch forward as well.