You could start by actually trying first.

Swap the red LEDs for blue, should tie the whole room together.

The wall plate is a great idea if you don’t mind cutting holes in the wall.

Honestly, I’d grab a couple of acoustic tiles to put on either side of the TV and chuck all that shit behind them. Maybe cinch up and ziptie anything I know doesn’t need to move for a while.

Here’s my idea: manage the cables.

You don’t need ideas, you just need to start.

You could look into getting some cable channels as a pretty cheap and easy solution. They’re just plastic half-tubes that you can bundle the cables into and stick to the wall, so you could just have one pipe that runs up the wall to the back of the TV. You can paint them to match the wall and hide it a bit, too.

I would say at this point any type of management would be good lol

Move the pc next to the shelf.

Move the sub under the tv.

Get surface mount cable runs and go down from the tv to the floor, over to the shelf, and up along the side of the shelf.

Not sure if it’s an option for you but, make a cabinet hidey-hole thing on the other side of the wall, run cables through wall and plug in somewhere over there, profit. That is, hide the mess somewhere else.

Some of the cables need to be longer to not have that effect where they’re being pulled against their own weight.

Then, lean into it: https://www.instructables.com/Maximum-Wire-Management/

I can’t get the cables looking good

It’s because you plan and do cables in the early stages, not in the end stage, if you ever want it to look good.

The only thing I can think of now:

Powerful golden spray paint on all cables. Make it shine, make it look like it was all intended like this.

Aye, it’s a fucking shit show alright. Hide the cables behind some low wooden shelves under the TV and put all the devices on those shelves (drill holes in the back of the shelves for the cables to go through). Otherwise stick that big black hairy god-awful pimp carpet over the whole lot of it and velcro it to the wall. Also, you need to get a good plasterer. That back wall is a fucking disgrace.

Longer cables so you can wrap the slack and hide it?

I tried this with velcro ties. Looked good for a while. Then I had to replace one and add another cable. It was a royal pain unwrapping everything and rewrapping it.

Haven’t used them, but look interesting:

Do you have attic access over that wall? A really long HDMI/RCA could go from behind the TV into the wall, up to attic, skip a few studs, then down to a brush faceplate behind the consoles

Lots of good ideas here. This is my take:

Get a bunch of Velcro cable ties. Start grouping things together. As you go, you’re going to get better placement ideas. Once everything is organized, you can decide the next step. Personally, I would look at having the PC in the bookshelf, and look for a way to put the cables in the wall.

If you do that, I’d suggest having 2 cable runs with a string looping through so that when you change things up you can easily pull a new cable.

Assuming you can cut into the wall… This is likely the cleanest option without doing electrical work.

https://www.homedepot.com/p/Commercial-Electric-Flat-Panel-TV-Cable-Organizer-Kit-5623-WH/305090874

If that extension cable jump isn’t up to the electric code they do make something similar where you can tie it into the hardwire as well. It doesn’t look like you have an outlet in the same stud section though. Which would make that harder.

Any remaining cables horizontally I’d just stuff in something like this above the trim at the bottom. You’d probably want to either source a black one or just paint it to match your walls.

https://www.homedepot.com/p/Commercial-Electric-4-ft-Flat-Screen-TV-Cord-Cover-A31-KW/304502793