I'm not sure I can answer this coherently; I came to the conclusion that good and evil are not objectively real, or even useful concepts, long enough ago that I can't accurately recreate the steps that got me there.

I do occasionally have conversations with people who use those words, and mentally translate 'good' (in that sense) to 'applause light-generating' and 'evil' to 'revulsion-generating', 'unacceptable in modern society', and/or 'considered by the speaker to do more harm than good', in estimated order of frequency of occurrence. (I often agree that things labeled evil do more harm than good, but if the person doing the 'evil' thing agreed, they wouldn't be doing it, so it's obviously at least somewhat debatable.) I don't use the word 'evil' at all, myself, and don't use 'good' in the good-vs.-evil sense.

Those words are also curiosity-stoppers - it's not very useful to label an action or viewpoint as 'evil'; it's much more useful to explore why the person doing that thing or holding that attitude believes that it's correct. Likewise, labeling something as 'good' reduces the chance of thinking critically about it, and noticing flaws or areas that could be improved.