I think that people are born in the middle, and then society teaches them to do what we would consider 'right' or 'wrong'. The thing is that most people who do 'bad' things consider them to be good for their purposes or think that they're good, so it can be hard to measure. Everything is quite relevant.
If you do good things because you don't want to be seen as a bad person, then that maybe needs examining. Most people who do 'good' things for non selfish reasons usually don't think about what they're doing as 'good', so probably don't consider themselves particularly good people.
For me, the measure of whether someone is good or bad is best taken from other people. If you do good things because your conscience tells you to, you're probably a good person. If you're wondering whether or not you're a good person because of your image, that might be a problem. If you're wondering whether or not you're a good person because you feel like you don't do enough good, you're probably a good person.
And if you care enough to worry about it all, then... You're probably a good person. ☺️
An excellent question, I enjoyed thinking about it.