My husband and I had travelled with Thai to Thailand twice before our recent trip. We had found the airline to be efficient, "elegant" and comfortable. A credit to their country.
Sadly the quality of their international service has declined a lot in the last few years. Whether this can be attributed to Covid, I cant say, but there was a big difference.
Check in and Boarding were chaotic. (Except in Sydney) We sat on the floor in Bangkok along with hundreds of others waiting for the gate lounge to open. It was awful. There were few clear directions or instructions when calling passengers to board. Every man for himself!!
On board the staff were rude or indifferent. Food was average and the drink service almost non existent. After the food service there was no offer of snacks or even water. It was abysmal and so different to the service we received in the past.
The cabin was noisy....kids listening to things without headphones in the middle of a night flight. People opening the window shutters in the middle of the night and not being asked by the staff to lower them. It seemed like the staff couldn't care less.
As a passenger you rely on the cabin crew to keep everything civilised, otherwise you get arguments between passengers and that is never going to end well.
I have resolved never to fly with Thai again and will never recommend them to anyone. I have flown with many many airlines and I was shocked by the demise of a once beautiful airline.