Is Zeus a good father

In my opinion, no.

According to evolutioary theory, yes, as Zeus was able to father many, many children. Thus, he is more reproductively fit than other males who did not pass on their genes to as many offspring.

However, Zeus, for the most part, did not actually have any further interaction with these children after they were sired with only a few exceptions. (Athena and Dinoysus, for example, were both born from Zeus -- head and thigh, respectively -- after Zeus killed their mothers -- Athena's purposefully and Dinoysus' accidentally)