I had a problem, recently and I decided to post my advice for players who are having issues with the internet connection during the game or may experience lag sometimes.
First of all, I bought a new laptop from HP which has AMD Ryzen 3 PRO 2300U w/ Radeon Vega Mobile Gfx 2.00 GHz and I experienced lag in the main menu and also in the game while trying to play...it was basically impossible.
Because this is a new model of processor , I recommend you to disable all the graphics advanced settings while playing the game such as these ones from the screenshot attached.
Personally, I did not have the necessary time to test these settings on some new games, but for this one ,specifically I did not see any improvement , so far.
With these settings disabled, the game is running decent now , even on the laptop.
Also I found some additional information posted by @Ace a few years ago, on the forum, as well and I used the following settings:
However you may add some extra performance by using the Razer Cortex: Game Booster which can be used to disable some of the unnecessary programs to have a smooth gaming experience.
In you have an older pc or laptop , I recommend to change it's HDD to an SSD and also add some RAM memory if it's possible and of course a decent internet connection with at least 100 MB/s.
You may also follow what @nAbish said on the following post if you want some extra settings in the game
If you have any other information, feel free to post it here because it might be useful for other players