Looking to Minimize my Current Audio Setup. Need advice.

Sorry if this is in the wrong category. I was not sure where to ask it at.

I am using a rather bulky setup to enhance my video game experience (see attached photo).

I chose this setup because I have bad hearing due to my time as an infantry marine. The set up that I use, has allowed me to adjust the frequencies that I have a hard time hearing, while minimizing the ones that I can hear just fine. This has really helped when playing FPS games that rely heavily on audio (siege, pubg).

Note, I wanted the mixing board, because as you can see, I am running audio to it from the MB sound port, as well as my Asus sound card. Doing this allows me to have a manual control over game volume, and manual control over voice chat volume. This is very handy when in a spot where I need to hear one or the other more strongly.

While this system has been handy, there are a few things that I do not much care for about it.

1) The o/p mixing board. As much as I enjoy being able to have the controls that the mixing board provides, its overall shape and size make for a hard way of setting it up around my computer. I also do not need to have 6 channels within it. This adds to the size of the thing, and again, that is one of the issues. I am looking to replace it with something smaller, that has no cables on the top or front. Just a small 2 channel volume control system (with maybe H,M,L control) that I could maybe set under my monitor or some other convenient location, without all of the cables displaying. If you look at the second photo attached, you can see that the mixing board sits on top with all the cables stick out. I'd much rather have something that I could put into the box below it, with a cut out for displaying the face only. TLDR, I would like to keep the features of the mixer, but in a smaller, prettier device.

2) The I/P mixer. I use this to be able to control my microphone. If my wife or kids walk in while I'm in a game to talk about life, I can use it to easily turn down my microphone without having to alt tab out of the game. The mixer is also silly shaped like the O/P one. It is oddly shaped, and has a too many channels again. I only need 1 input and output for the device, and just need to control the volume with it.

3) The Amp. The amp that I have is a 4 channel headphone amp. This thing is overkill, and takes a lot of space in the wooden box. I do not need a 4 channel amp, just a single. So, something smaller with one channel would be fantastic. 

4) The EQ size. I am not certain if I really need an EQ that is almost 20 inches wide. I do like having all of the frequencies (20 up to 20k), but if there was something out there smaller, and with a controller for both left and right in one instead of the current one that has a separate control for each side,  I would prefer to go with that.

When I originally purchased all my stuff, I did so off amazon, and only did research with the little knowledge I had, so I was fine with buying all of the equipment as it was. I am in the process of rearranging my computer  setup, and I think that it would be nice to go ahead and knock out the replacement audio equipment now.

My ultimate goal, is to try to make this whole set up as small as possible, without sacrificing quality, just eliminating all the unused aspects of the equipment.

So, I guess my question is, Do you have any recommendations for this?

Thank you