5:45 Here, you're isolated from your sova in a 2v1. Your, and your sova's priority right now should be determining the location of the enemy sova while avoiding solo fights. You should be using your dash here to take a quick fight and almost immediately dashing away after contact so your sova knows where to go to help you. I don't think I have to say why what you did here was not a good idea.
7:40 At this point, your sova rotated to bottom mid to help you. He can only hold top mid from bottom mid, so both of you watching top mid is pretty redundant. Also, your sova is unable to cover your tiles peek. Try to be aware of what your teammates are holding, and if they're holding the same angle while leaving another angle exposed (tiles) then you should be the one holding the other angle. Not holding tiles from cat just gave the enemy team a huge pick and they win the round off it.
10:13 Don't shoot knives through smokes unless you have a backup weapon.
11:23 If you look at the minimap, there is 0 way that anyone could be on site right now, to me it looked like you were trying to spam the drone through the smoke. Here you should be peeking through the door smoke with dash to help your team fight A main since they aren't on site yet.
20:09 To make this round even winnable, you need to pick up that phantom and w key into site with it, and hope you delete the last 2 players. Not sure why you're holding onto the OP in the last round of the half.
24:18 Unnecessary dash pop.
27:51 With 1 knife left, just switch to your vandal. Also, dashing in without throwing a smoke first is just asking to die in an untradable position.
29:07 After spotting brim, you know that sova is the only person that could be on B site, since you saw Reyna cat earlier. You should comm this to the team to go 4 B together and take the 4v1 on B site.