Tā bù tīng dàjiā de quàngào, yīyì-gūxíng, jiéguǒ shībài le.
He ignored everyone's advice and stubbornly went his own way, and ended up failing.
Tips
memory
Literal meaning: 'one idea, lone action' (一意 = one idea; 孤行 = solitary action). Picture someone walking alone (孤行) with only one fixed idea (一意) in their head, refusing to listen to anyone else.
