That is repairable, what you need to do is replacing the switch. You first need to open up your keyboard, then you need to desolder the LED and the switch, pull the LED off (remember which pin was on the left/right, I suggest marking it with some tape), then pull off the switch from the plate. You can then put in the new switch, solder it in and then put in the LED and solder that in. There's a notch for the LED so don't worry about that.
Do you have soldering/desldering experience? If not, we can explain that in a lot more detail
More details on all those things also in the link in my signature.
the switch can be disassembled but depending on the mount you may need to de/re-solder
Ducky uses plate mount switches, so it needs to be desoldered and resoldered.