Why does this game constantly kill my internet connection?

I literally did a speed test before starting my match to make sure there wouldn't be any question as to if I would be playing or not.

Literally after the final ban was in place during my solo q ranked champ selection the internet died, of course I was first to confirm a champion and because the internet died on me I was kicked out.

This has been happening since the option to download the 'Beta Client' early about 2-3 weeks ago, it is mandatory to have now but I still use legacy client.

I've had constantly internet crashes and it is literally caused by this game, and only by this game.

Then I get punished for not finishing through champion selections and being AFK in matches because you guys constantly kill my internet.

I even have people in my house complain about the internet slowing down for their uses every single time league of legends decides to kill my internet.

Only when the BETA client was pushed onto the general population has this started happening.