Unable to connect to FACEIT CS:GO servers.No AV,no firewall,good network connection

I'm new to faceit and almost each time I want to play I'm forced to join a server(mostly german ones,while I live in middle-east) which is unreachable for me.I can ping the server of course but I get retrying public(...) messages in console and finally fail to join the match,an as the result I get AFK bans each time(now 18 hours,for something that I've no control over it,it's just painful)

I've whitelisted FACEIT and CS:GO in Win10 firewall config,I've no active AV,my internet connection is fairly good,and I asked my ISP and they said they don't block any port.

I tried scanning the CS:GO ports of one of those servers via Nmap and all of them are filtered...

I've reported this multiple times to FACEIT and got no response.asked this on their subreddits,no luck

Any idea?

Thanks in advance.