The posts quoted all seemed vaguely familiar that I thought they were older posts. They are actually quite recent but the reason they seem familiar is because this user has a habit of repeating the same thing over and over again but phrasing it a little differently each time.

Here are some examples of them talking about chasing losses in gambling.
https://ninjastic.space/search?author=borovichok&content=chasing

The most recent of these results all have that uncanny valley effect where you can just tell they were written by AI. Some of them are detected as being partially or wholly written by AI. Some others are not but I suspect they could be using something like the “more casual” setting in Google Gemini or perhaps an AI humanizer.