ChatGPT can generate an infinite amount of average sounding content on any topic. The world doesn’t need any more content. I have no idea what you need 1000 blog posts to say.
If you can write something with original ideas that’s worth reading, then people will recognize its humanity.
If that's the case, before you write on a topic search for top posts on the same topic and make sure you add something new and different to the topic as well.
In terms of style, if you yourself have trouble distinguishing between good individual writing and blogspam you should also try to improve your blogspam radar. Recognizing the characterestics people see in other writing they regard as blogspam will help recognize and prevent similar characteristics in your own writing.
If you can write something with original ideas that’s worth reading, then people will recognize its humanity.