This game is fairly easy to get a win in but comes down to some luck. Turn off cross play to make this easier, also play at odd times when less people are playing as it fills the remaining players with bots. The bots are extremely bad and pretty much just stand there and let you kill them while missing hitting you.
I've won multiple games due to it just being bots left at the end that were super easy to kill, which is why I mentioned it takes a bit of luck to queue into a game with mostly bots.
This will probably come naturally anyway when working towards the completion, but will get more difficult as the game gets more popular and players get better, so I recommend going for this ASAP while there is still a good amount of bots in the games.