strange client bug.

In game about 30 some mins into the game, things were going very hard back and forth, when I got Dc'ed from the match, so i tried the usual of exiting the match, and resting my internet but when i left the match, were the screen that pops up where you click to enter the match, well that wasn't there instead of was brought to the main client screen where you can click to enter game ques. so i didn't get to finish my match, which sucks since it feels like my client is doing everything it can to stop me from achieving a win status, i can lose games no issues but when my team is winning, oddly enough someone gets booted from the match or everyone on my team starts lagging, its just one thing or another that happens but only after like 30 mins has past. I mainly play summoner rift -normals blind que.