1.) You could try a controller holder:

https://www.amazon.com/Controller-Headphone-KELJUN-Adjustable-Accessories/dp/B0915F2SQM/ref=sr_1_4?crid=1VXAID7IOEIB8&keywords=controller+holder&qid=1649706235&sprefix=controller+holde%2Caps%2C226&sr=8-4

2.) You can hang your headphones on a hook, either try making one yourself with command tape or get something like this:

https://www.amazon.com/Lamicall-Headphone-Stand-Headset-Holder/dp/B08N5QT8YR/ref=sr_1_1_sspa?crid=1UTOR1RZAPTXG&keywords=headphone+desk+hook&qid=1649706287&sprefix=headphone+desk%2Caps%2C129&sr=8-1-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUExWjlCNkxOWktHVzdCJmVuY3J5cHRlZElkPUEwMDM3MjUwT1RIR0c2SzFQSTU4JmVuY3J5cHRlZEFkSWQ9QTAwODA2OTAyQ0tGVzZEREJaVVNVJndpZGdldE5hbWU9c3BfYXRmJmFjdGlvbj1jbGlja1JlZGlyZWN0JmRvTm90TG9nQ2xpY2s9dHJ1ZQ==

3.) Peel off the small sticker at the bottom of your monitor

4.) Store everything that's not your kb, controllers, mouse, monitor, headphones (aka things absolutely essential to your setup) in the drawers of your desk. If you stored the remote for instance it would look more spacious and clean :3

5.) If you wanted to elevate the monitor thats being partially blocked behind your gaming monitor, maybe you could use some kind of a monitor stand or just a random book or block to hold it up.