Severe overtraining if thats the case. Id isolate them once a week, maybe twice, the most.
Try compounds such as hang cleans. They recruit the calves big time when you perform them in an explosive manner. Maybe skip a cardio session and perform some farmer walks instead.
You said you squat. squats seem to recruit calves for me but it has to be heavy with the right foot positioning. Btw, Your ankle bone structure seems unusually narrow for someone who squats 400 for reps.
^ keeping all of this mind, what is your caloric intake looking like? Whats your current bodyweight? You'll need a cal surplus for any growth.