You're absolutley wrong. Air quality is a huge issue in most Asian countries due to crop burning especially Thailand. You should look at the AQI and pm2.5 levels on a trusted app.
I looked at AQI right now and forecast for next few days and don't find there anything extreme, just a little bit dirtier air during rush hours caused by crappy cars and motorbikes without filters, but nothing extreme anyway, slightly above what is considered completely healthy.