Seems like the thing that people have a hard time understanding or role playing is that you don't have to strictly adhere to your alignment.. It's an easy mistake to see alignments as some sort of restriction on personality or to see them as single lines that cannot be crossed. One evil choice doesn't make your good character evil because people are allowed to make choices, mistakes and have free will. Alignments are simply gauges with lots of wiggle room.
This is common enough in the communities that put Alignments on a pedestal that it is part of why I've tended to drop alignments entirely when I play or run. There are more personal roleplaying guides in 5e anyway. It's not necessary.
