Failed as Sven

Yo, this time I kinda think I know why I lost. But Im not sure 100%. My Farm was mediocore but Gold was rly not an issue this game. I could buy what i want. I think my Item Build was bad. After watching the Game I asked myself why I didnt bought butterfly or satanic... Or actually why not both? I think this is the main reason we lost. What do you think? Ty https://dotabuff.com/matches/6178108208