Fanatec ClubSport steering wheels are modular and frequently swapped, which puts stress on paddle shifters, buttons, and the wheel-to-base connection. Broken paddle shifters are often repairable if the fault is isolated to the paddle module, microswitch, or a small internal cable-repairs that stay under the threshold can be worthwhile, especially if the rim is otherwise in great condition.
If you have multiple failing inputs (buttons double-pressing, encoders skipping) plus connection issues at the quick release contacts, repair can snowball into repeated downtime. Replacement makes more sense when reliability is critical for competitive racing, or if the rim has cosmetic damage that affects grip and comfort.
Also consider whether you can source parts quickly; long waits increase the value of replacing. Pricing referenced from Fanatec US ClubSport steering wheel listings.