If You Lose w/ This Build?
Blame your team.
Alternatively, look at yourself and think what went wrong and how you can get better. Consider whether your laning situation was appropriate. Not having strong lanes or lanes with a realistic farm priority, or both, (Sniper and PL in one lane?) can end your game before it really starts. Did you take teamfights against enemy teamfight ultimates instead of split pushing? Did your team gank effectively or have wards at critical times? If every lane but yours lost then even great play by just you can't win the game. If you or your team made a major mistake (5-man Reverse Polarity?) that can cost you the game. It's actually really good to think about why you lost a game afterwards as it forces you to adapt. You can check out replays in your game history.