What I want to tell you is to withdraw cash from an ATM in Thailand. There was a handling fee at that time. I have seen some charge 50 baht per transaction, and some charge 150 baht per transaction. Sorry, I don't remember which bank's ATM is.
It's really best not to use credit cards in Thailand. If you must use it, you'd better use one with a chip. It seems that our country handed over a group of criminals engaged in fraud to the Thai police last week.
In fact, it is quite safe to use cash in Thailand, and there is no problem with public security (except in some places in southern Thailand)