If you have to run the cables "aerially" like that, velcro tie them into bundles of 6 or 8.
When you have a lot of cables, cable management bars really help. I quite like the "fingered" variety, like: https://cdlnz.com/PP-CMC01 You take the lid off, run the cables, and then put the lid back on to make it tidy. This is an example using both horitzontal and vertical fingers (the vertical fingers don't have their lid on here).
While I do like the look of a tidy network cabinet for me practicality comes first, your cables look easy to trace / replace so if it was me I'd be leaving as is, tidying them is going to cost money which to me is a waste.
As long as I don't need to spend 5 mins looking for a cable I'm happy for them to be "ugly"
The cabling job only looks a little ugly because you've got a longer cable than is necessary so your eye just see's the big loops.
As @GIdenJoe mentioned, getting some shorter cables might help.
Some other general guidelines:
- Micro/Slimline cables make a world of difference
- Cable management (where it works)
- Velcro cut to various sizes as needed
- Try to keep cable runs going to similar sides of the rack. Eg. Most cables going to switch 1go left while cables going to switch 2 go right. Or left half of the switch runs left, right half of the switch runs right.
- Where possible, use appropriately sized cables. In the real world this isn't always possible but the worst cabling jobs are where you find a 2m ethernet cable for a 20cm connection, and the rest of it is looped up somewhere.