Clark's portrait in MoS is fine. IMO, his motivations needed to be fleshed out more during the 1st act, and the destruction of 3rd act should've been toned down and let Superman speaking his mind more while facing Zod.
BvS is where the real problems lying. Instead of listening to the common criticisms to MoS, Snyder doubled down on things that people hated of the previous movie and reduced Superman to a plot device.
JL as a whole is an amateurish piece of garbage that I don't even consider a movie. However, I liked the 2 deleted scenes with Superman filmed by Snyder.