Connection of LAN8742A nRST pin causes failure when ESD strike
C14, at 0.1uf 1206, is going to resonate around 20MHz.  For higher frequencies (such as those radiated by ESD spikes) use a smaller one, say 100pF, closer to the IC, and put a ferrite between them (to provide additional filtering in addition to decoupling the caps enough to avoid tank resonances).