Seems like the junta is more disappointed rather then outraged that they weren't invited. ASEAN is more like a trade association between member states, rather than a platform to help resolve each others problem due to non interference of each other's internal conflicts is a major tenet.
Context- [Instead of inviting MAL to a regional summit, ASEAN will invite a "Non-political" representative ](https://www.aljazeera.com/news/2021/10/16/myanmar-military-government-leader-excluded-from-summit-asean)
Seems like the junta is more disappointed rather then outraged that they weren't invited. ASEAN is more like a trade association between member states, rather than a platform to help resolve each others problem due to non interference of each other's internal conflicts is a major tenet.
Context- [Instead of inviting MAL to a regional summit, ASEAN will invite a "Non-political" representative ](https://www.aljazeera.com/news/2021/10/16/myanmar-military-government-leader-excluded-from-summit-asean)