What to do when you read stuff you don't understand or have an answer to?

Considering the first three points talk about how everything meaningful to us is just brain structure and algorithms I’m not sure about that. He also seems to say there is no motivation because that implies some self to be motivated

Well it’s more like the fact that I can’t find or remember it bothers me. Like I have to know what it is in order it move on

Perhaps we are reading different articles. That’s sarcasm, it’s your link. He literally says this,

The previous section was an argument against the common intuition that intuitive self-models have an overwhelming, foundational impact on motivations. But I want to be clear that they do have some impact. Specifically, they have an impact on motivation via associations between concepts.

Everyone forgets things and loses things. Homosexuality is not deviance, but there are plenty of people out there who think it is. Arguing with them, or even reading their points of view is not a productive use of your time. Work in developing your own logic instead.