I don't know if it's the cliente or the game itself, but if the EUW server is full, I'm ALWAYS the one who gets disconnected no matter what (playing ranked or normal, I get disconnected for no reason).
I switch servers to NA and i can log in there, so the problem isn't from my internet.
I repaired the client with that troubleshooting full repair, i got bugsplat (ID: #170690158) and got into the game, but got disconnected again after 3 mins for no reason again.
This just happens to me, nobody in my friends list got this problem EVER.
Please, repair this bug, because i continue to lose rankeds thanks to this.