Can you please tell me is this good formulation of the sentence? [closed]

Also, we can learn from the life experience that, despite the fact how the good person had been after he did 1 bad thing, then he is already the target of many criticizers.

I stumbled upon this site. First question I read was yours. I wondered if I could offer anything of value, so I tried to stay pertinent to the main context of your sentence, shortening it, while keeping your pertinent points. I hope I helped? If not, I hope your day is a good one MathBoy!

"Life experience reveals no matter how good a person has been after committing an egregious act, there are those who will use his past against him."