Hello, front tyres wear in WTCC is extremely exaggerated; in 20 min race they are blinking in orange/red. This issue not occurs in other FWD or RWD car.
The tires for the WTCC cars are meant to last as long as a WTCC race is. Since the WTCC only does sprint races, the tires are only meant to last about 25-30 minutes depending on the circuit. From personal experience, 30 mins is really the upper limit here. Other people who are a bit easier on the tires will be able to do 30 without problems though. I would probably recommend you never use the 2x or 4x tire wear multipliers for this reason...