I think future coups will always persist in Thailand.
The military don't care about what the rest of the world thinks, the military certainly doesn't care what the majority of Thai citizens want.
The rest of the world will continue to trade with coup leaders, as we've seen with Prayut.
In fact they look at Thailand as having a bonafide government with an elected leader.
Internet/social media changes nothing... it reports what's happening.. but that's too late.
The average Thai is too lethargic to get out and protest, leaving it to the younger student generation who are easy targets for the military.
Emergency decrees and other laws are put into effect to stop mass gatherings.
Thailands political stability puts off large scale investment by many other countries, which denies it's populous access to real employment opportunities.
Which is part of the reason why the entertainment industry is so important to the nation.
It employs thousands of service girls and ladyboys who otherwise would be unemployed, catering to the sex industry to get by and attract tourism to help bolster an otherwise lackluster GDP.
The education system is government run so as to not educate the next generation, only to indoctrinate them into being worker ants and be subservient to the masters.
Many Thais have access to the internet to see what goes on in other countries, many now travel and try to reside overseas, should they return they have little chance of changing things here.
The military is just too strong, and men of influence will always reign supreme in Thailand.