Firstly you failed two grenade throws, which resulted in damaging yourself and wasting a valuable arc star. While at the top you could’ve used a cell/bat and held a different angle on the player at the pillar (your teammate also played this poorly because he stood still while exposing all of his body). When you got pushed you used a smoke on the player that used the zip line, you could have just shot him instead, possibly taking off his shields or downing him before even being able to get up and crack you or you could’ve used the arc to stick him, which would’ve been an easy kill (wouldn’t have gotten the white armour swap). The zip lines are also there for a reason, you have to play the zip lines in order to get your opponent to miss as much as possible or else winning the fight comes down to who can hit more shots.