deezeewhytea

It might be a problem with the cable inside the headphones, over time the cables wear out on the inside and in some cases cables even snap on the inside. then again it could be what port your plugging them into, try blowing the port with compressed air, if that doesn't work, swap port, if that doesn't work, your f*cked. if anyone else has any ideas, please post them because this has happened a lot to me in the past and I can't really figure out what the problem is

It will fit. I used to have a MALM desk with a 22", 24" and my PC on it.
Photo of ugly horrible (old) setup:
I should really clean up my desk and make a new picture...
 
Now I have a corner desk (IKEA Galant) which I got super cheap second hand and that works just a lot better IMO.
If you have the room, I would strongly suggest that too. Second hand model has some blemishes and a sun damaged spot, but it's a lot nicer to have all that room.
 
EDIT: by the way, I should mention I just measured my old MALM and see I mine is a little over 150cm wide, so your's seem a little narrower. But that shouldn't be a huge deal. As you could see in the picture, my PC had some clearance on the side and if your monitor stand allows for it, it could overhang the edge of the desk a little.

That's going to be real tight. I'd just leave the tower on the floor.
I have the 72" desk, and if I had 2 monitors it'd be a real tight fit with my speakers without a case.

What's considered cramped is up to you. That seems fine to me as long as the side of the tower is near a wall. I'd otherwise be worried about it being knocked over.

I think it might be that it only supports orange lighting, and that you can't change it.
 
I have an Asus Prime Z370-P, which came with glowing orange LEDs out of the box like yours, but later found out that it's not an RGB strip, and only glows in orange lighting.

it's as bad

the 550 watt uses a different platform than the 600 watt and higher
 
the mwe bronze 550 watt is a tier lower because of that

No, about the same.

i would say yes
 
but no
 
it's better, but not good enough

or like any psu from the psu tier list that's at least tier c

No, it's not good.
What about a:
 
beQuiet! System Power 9 (400W+)
beQuiet! Pure Power 11 (all wattages, including 300W)
Corsair CX (2017/gray text)
Corsair CXM (2015/gray text)
SeaSonic Focus Gold
SeaSonic Focus Plus Gold/Platinum/Titanium

The Raider II fine. You don't need anywhere near 550W, though, so you could check for lower wattage PSUs. Check out the BitFenix Formula 450W.