Parveen Travels — Co passengers

I was travelling from Chennai to coonoor on 25th May 2023 in TN21BZ3899 seat number 3. During my travel till Villupuram there were few seats were empty. In Villupuram driver accommodated few seats and a person who sat on seat number 4 was fully drunk. He don’t have consciousness at all he was spitting here and there. He was putting his hand and foot here and there and the smell of the alcohol I felt like vomiting and he made me uncomfortable. Can you explain why the driver is accepting this kind of passengers. I was awake during my trip and I never expect this from Parveen travels. When I was complaining To driver he didn’t bother jus asked him to sit properly, what kind of service is this?