Afaik, there's been a serious problem for Destiny players in Pakistan ever since the government issued some specific requirements to all the national ISPs (something about VPNs, I'm not sure exactly what, how and why) that has clearly broken somehow the connection from your Country to Bungie's servers.
That latency is far to high to be playing Destiny 2 PVP. There will never be dedicated PVP servers in this game.There is nothing Bungie can do to fix this problem for you I'm sorry. Either we as guardians have a stable internet connection much more stability is required than "ANY" other game there is or we just cannot play the game modes that connect us with other P2P Guardians. Eventually you will get restrictions from them I'm sorry that's just the reality. Bungie provides a game service either we can connect to it or we can't and we must troubleshoot and upgrade/change providers to accomodate that requirement. That's the best way I answer your problem.