[…] many of them still believe god exists, but that he has let them down and so they keep their belief in his existence, but no longer worship him (and even hate him). ie rather than switching to atheism, they switch from eutheism to dystheism (although they may incorrectly call themselves atheist).
Source: wiktionary
Protest theology rejects the often axiomatic assumption that God is always good or just (eutheism). More to the point, it holds that the eutheistic outlook not only stunts our ability to have a true, meaningful relationship with God, but that the theological contortions it demands also cause us to miss several important themes and lessons latent in the Hebrew Bible.
Source: wiktionary
Dystheism revolves around “the belief that a god, goddess, or singular God is not wholly good (eutheism) as is commonly believed (such as in the monotheistic religions of Christianity and Judaism), and is possibly evil.”
Source: wiktionary