Help me make sense of this situation

Recently, I joined a startup that claimed to offer job roles with salaries ranging from 6 to 10 LPA. After my interview, I was offered only 4 LPA, which I accepted because I wanted to start my career. They also mentioned that employees would need to work on Saturdays and the last Sunday of the month, which I agreed to as well. Additionally, they set the working hours from 10 AM to 8 PM, and I accepted this too.

However, within a day of joining, they expected me to stay until 10 PM. On top of that, they informed me that I wouldn’t receive any paid holidays for the first two months. On Saturday, I told the founder that I couldn’t stay past 8 PM because I needed to take an auto home alone.

This morning, I arrived at 10:15 AM due to being stuck in traffic caused by a local event. At 11 AM, I was informed that I was terminated. I’m not sad about the termination but rather confused about the situation. Did the founder expect me to beg for the job, or am I being unrealistic in expecting decent working hours for such a low salary? The manager even kept the punch machine in his room so that no one could leave without informing him. Am I being unrealistic, or is this environment extremely toxic?