PBE first imprssions

I wanted to join pbe to test the runes on the champions I play. My first game ever, I started off 4-1 against Yasuo top with Taric. Yasuo rage quit. Soon after, my bottom lane rage quit when the enemy Xayah was on a rampage of her own. After this, I realized that the enemy Sona never connected. At this point, the game was 3v3. My Ezreal then started a surrender vote and it failed so he quit making it 2v3. Kayn and I were holding our own until the enemy grouped and we couldn't get to Xayah due to Zac's peeling. After a lost 2v3 fight, Kayn finally left leaving it at 1v3. How am I supposed to test anything in an environment like this?