Although I agree with you, students questioning their teachers will probably not go down to well with the Thai hierarchy. It is so ingrained into Thai "culture" to not question those in the educational system (and elsewhere) that this would be very difficult to change.
In looking at the World University rankings for 2023 as put out by The Times Higher Education I found that Chula was ranked highest for Thai universities. It was grouped somewhere between #801 - 1000. Mahidol was ranked at #4 for Thai universities and in the same band as Chula. Surprisingly, Thammasat was only #10 amongst Thai universities and was in the #1201-1500 band of universities.
https://www.timeshighereducation.com/world-university-rankings/2023/world-ranking#!/length/25/locations/THA/sort_by/rank/sort_order/asc/cols/stats