They literally had the better draft. They gave out Yone for Senna Tahm and it worked on paper, all they had to do was keep the game somewhat equalized until at least 25-30 min so they have their core items to completely control teamfights with their comp (even if they're down like 3-5k gold), but they went back on their strat for stupid ass risky calls that didn't work out (full commit onto Guma for no reason --> lose 5 for 1). They even rolled over and gave up the last baron in hopes that the game can lead into the late somehow. WBG are fucking idiots lol.