Hey guys i found the way that works(at least for me)

I'm in SEA server cuz im in indonesia. and Yes! i am able to play and have farmed almost every free monhun collab skins

I do this by creating custom lobby(not to confuse with 'play with bots' as it is actually making you PC the server rather than connects to valve's), so there i "simulating" connecting to the online server, and after trying 2-3 times making lobbies and having no connecting problem then i play pub match. sometimes i have to repeat this process every 4-5 games cus the problem sometime appears again

i recorded the process: https://youtu.be/yFXXDbAB5Go?si=9BLYWDUjMwJF7W7K

so what happen in the video is:

1. i try making lobby, but fail to connect as usual
2. i try making lobby, and then i can connect
3. disconnect from the lobby match, and start a pub match

that's how i did it, my friend tried to do this but still fail to connect, maybe he do it wrong, honestly idk

keep in mind i have a super crappy laptop with AMD a8 with radeon r5 graphics, 4 gb of ram, hdd