I have to step up my AI detection standards, and I will try to figure out how.
It's not that difficult. AI-generated texts will always have a different tone to it, you will barely see mistakes unless someone adds them manually like how OP has done it and was caught, and there is one easy way to find out if a person is using AI for most of his posts or not, and that is to have a look at his post history. Someone won't have all their posts written by an AI, so you will find a few posts written by him in the mix, and you will notice a difference in the tone, you will find more mistakes, grammatical or punctuational, in posts written by the user himself, and then you can understand there is something wrong.
And of course, you can always ask others in the
AI Spam Report Reference Thread to help you check the posts of a user that you suspect of using AI to make posts.

Is there maintain any rule to give or take merit, I don't think so . whoever wants to give or take merit. If you pay attention here above the post of mine, one person has been given maximum of ten merits just because catch me . I have merits and I have right to give anyone and how many I want . That means nobody cares any rules and regulation . I'm not complaining the system, I just want to remember to you that it is not right to blame only one person. At the end I want to say you all are honorable and very busy person. So enough is enough,just stop and close this matter. It should be better for all the respectable members. We are not enemy to each other. Need peace everywhere .
Just because there is no rule or moderation for merits received or given, it doesn't mean no one will notice or find unusual activities in it. No one is fighting you, you made mistakes, got your posts removed, you raised the concern yourself and you were told what you've done wrong. So, the best course of action for you from here onwards is to accept your mistakes, evaluate what you've done wrong and try to not repeat it again.