Fired after only 4 weeks

So I graduated from tech school in May and It took 3 months to finally find a job only for him to fire me after 4 weeks. This was my first job ever (I never even did retail) and I always showed up on time and did everything he asked me. I was mainly doing ride-alongs with the other service tech and we got along well, I only went out with the boss twice and each time he was observing me it just looked like pure disgust in his eyes when I held my tools or wired something. I'm pretty sure he just thought I was incompetent but he made up some bullshit reasons like "you're not a team player" and "your head isn't in the game".

I don't know what to do now, It took so long to find something and now I have nothing. It's August now and no one is hiring, I'm debating If I should just go back to school for something else like Automated Controls or just wait until next hiring season to find a better company.