general suggestions: egg crates/padded foam behind the speakers in the corners, thick carpet on the floor, sofa/chairs, etc. instead of blinds, consider heavier cloth window shades.

make sure first reflections are deadened, mainly meaning side and back of rooms are covered with something.

be helpful if you drew a ms paint schematic of your room with dimensions and such.

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if the room is nearly empty there's nothing you can really do unless you add some sound dampening material in the corners to begin with.

You need some furniture etc to absorb the sound. There is no point in making the room acoustically perfect from a financial point of view ( it can get really expensive if it's a large room). Just wait it out till everything arrives but in the interim you could put some blankets up on the walls that works fairly well for a quick fix.

You are in a larger room now and things are going to sound differently especially the bass. There is a larger area for sound dispersion.
Alternatively you could get a more powerful subwoofer.

My living room sounds like complete ass.

14 foot ceilings are killing it. My sound is also aimed right down my hallway and there is no other arrangements.

Conclusion... deck out your bedroom instead.