[KPAH]

Well, actually is up to you.
I wouldn't give up so early.
The problem with your player is most obviously a messed up partition - that's why the player cannot read files to generate the database and hangs.
The obvious solution is to format it somehow. Are you sure it is not recongnized?
Try following the procedure once again. There's a good chance the CheckFlash utility will see it in low level mode.
Try inserting a flash card into the slot. Perhaps the player will start and mount in windows.

The next obvious step is to reflash it. This is done by turning the player into recovery mode. Search for a combination. often it is hold power &volume down buttons, and then insert the cable.
For rockchip, it is often turn off power, hold the M button (or joystick up) and then plug in usb until RockchipUSBdevice is recognized.

The most effecient way is to shortcut I\0-0 I\0-1 flash outputs.
After that you can reflash it by utilities from the download sections.

I don't give any links on purpose. All could be found here on the site. Including the full flash firmware. Search for them! Many people took effort to contribute to the site, and you don't even want to search!
Your case is even not a brick one. The device obviously boots.
You lost your time and now you're to lazy to continue? Seriously, that's ridiculous. If this was in Snowierasha, the player would format YOU!!11