Asian airports I’ve been in a fair amount: Singapore and Kuala Lumpur, and they both look nice enough but they aren’t great to spend time in.
Singapore has a particular issue in that there’s the gate with loads of seating (and charging points) but they only open the fucker a few minutes before the flight and you need to go through security to get in. So the majority of your hours of waiting you’re just outside sitting on the floor.
For Malaysia it’s a similar setup but they also have some weird aspects: they have a soft play, but you can’t get to it if you’re transferring, that’s a completely different part of the complex and it’s not a great place to hang around.
I have a feeling Bangkok is a similarly crazy setup as Singapore and we all spent hours in a cold high up point with no seats waiting until they let us into the warm gate area with seats, a few mins before we had to get on the plane. (EDIT for clarity: this happened and I think it must have been Bangkok but it’s hard to remember a mid-Australia flight with any great detail beyond discomforts.)