Let go for second time in 8 months

Hey FGB community.... help me rally through my current situation. I was let go in October from a job I had moved my family to a new city for. Reason given - untrustworthy. The back story to this is I was the backfill for my boss and had 11 years of experience on her. I was then unemployed for 4 months. Was the finalist in 3 different positions, and then landed a job, much less pay for a small company. I jumped on the job, as I needed something to pass time and get my head back up. The job description and the actually duties were NOT the same... what was “sold“ to me was completely different. I was not challenged enough and not happy. But doing everything asked of me. But I started to search again. Well, today, I went into work, processed payroll, then was pulled into the bosses office and let go. Reason being “he is going to go a different direction.” I asked no questions. I did as asked, packed up my office and left. I told him the status of a few things I was working on. In the parking lot he said he was sorry and appreciated my professionalism. So here I am.... jobless again. More than anything- how do I figure out of I really am the problem?? I mean, I do not really think that I am, I think I am having a hard time figuring out the culture of companies I am working for. As you can not get a good feel in 2 or 3 small conversations in an interview process. I worked for 20 years at the employer I left to move away.... How do I push myself to keep moving forward??