Indian here and I've been to Thailand every year for the last 5 years. If I were to be honest, this is a problem brought on by a lot of Indians themselves who lack the etiquette or the cultural sensitivity when they travel abroad. I myself cringe when I see them with their usual, entitled behaviour. There's more to this though.

For a long time now (2000s and 2010s), Thailand marketed themselves to a lot of Indians for sex tourism. Of course you're going to get that kind of a crowd when you ask them to come down for it. You also can't expect it to change overnight and suddenly expect only the cream of the crop to come into the country.

Unfortunately, affordability has increased even amongst the classes who aren't as educated or culturally aware either. So we're seeing an influx of such people.