Basically, Thailand isn't cheap anymore, for booze nor women.
They are mercenary nowadays, rather than fun. It is about having a good time; it's about clawing ladydrinks out the customer.
Then, there's the bill padding and scams.
Not only in the bars, but the entire tourism industry is a rip off: tuk tuks, canal boat tours, jet skis, snorkeling trips, taxis, paying 10× for any famous attraction, etc. etc.
And as others mentioned, the younger prostitutes are mostly online now (which is no fun).
The bars are full of tired, old hags, that have literally been in the business 30 years, lol.
The seafood smells bad, the nature is ruined, the roads are some of the most dangerous in the world.
They have replaced all the charming places that had character with a mall, hotel, or office block.
Thailand doesn't have much going for it anymore.
Frankly, I am quite enjoying watching it unfold as I am not a tourist anymore and I was able to enjoy it for many years while it was still good.