Serious gamers know that mouse/keyboard is the superior control, esp for real time strategy and first person shooter games.
I have modded likely 50 or so controllers over the years, from simple paint jobs to full blown hydro-dipped shells, adding buttons on the rear, adding hair triggers, adding rapid fire or more advanced mod chips, swapping out the LED colors, you name it.
I have also done many repairs, the pots on the joysticks always wear out, and these particular designs tend to break at the shoulder buttons over the years. In all of my work, I have only had 1 controller that lost its mind and I could not repair, but that also came from my 10 yo nephew, so no telling what abuse it had seen.
I haven't done any serious mods in the last couple years, but I have had to do a few repairs. The first party vendors have started realizing they were leaving $ on the table in this niche, so it is much more common now to find "custom" controllers off the shelf, and the XBOX elite controller is a very fine controller indeed (you pay for it too). I have had to repair my elite controller already, so I did a few facelift mods while I had it apart.
And, hey, I play almost exclusively online, so I will take every advantage I can get over these online brats