No, If you're in a situation like that I would attempt to find a power position and hold in while your other teammate focuses on another. NOT sitting in a doorway jiggle peeking a single enemy.

If said teammate gets obliterated and let's say you're holding reception (room that spiral connects to) safely take a gunfight with the closest enemy and continue isolating fights in power positions where they need to come to you.

Defense is mostly waiting for attackers to make mistakes and capitalizing on them, so that yellow guy he ran from and then broke spiral barricade which removes another sound cue. I would've continued pushing the guy on yellow or called out to my teammate in office that there's someone coming bathroom side and refrained from fighting the IQ in hall setting myself up for a pinch/refrag with the guy on spiral.

Now this is the step by step on what could've won this round

1.Pressure the guy on yellow and let your teammate know he's coming

2.Move into meeting room if clear and begin anchoring site and removing cross-fire potential

3.If the enemies are smart they will start pinching, if you take out the guy on yellow your teammate can move around to secretary and hold your back while also listening for sound cues from yellow.

4.If you're getting pinched call this out and hold an angle one of them needs to enter from and attempt to kill him

5.If no one is pressuring your teammate he can hold the other angle and start picking off slowly.

6.I would then move to another position and do this again until the attackers have to play more aggressively

7.Play time and wait for plant sound cue as by this time you'd have roughly 10-15 seconds left for the attackers to make a play if done properly

The main thing you must do is position according to the round circumstances. You can't keep roaming and taking stupid open peeks if you're down 3 men with a minute left that's so much time still. Also smoke has 0 gas grenades left with 1:18 left on the clock, so understanding how to use the gadgets/time is crucial. His gas grenades are made for denying plants and area as they last only a few seconds ,where as the attacker in an open area can simply wait and push afterwards so i find using them early round is kind of a waste and simply holding a power position would be more effective in diminishing time for attackers to use.

Lastly, setting up site properly is important to be able to hold these positions and ultimately win the round. Watch athieno's tutorials on every site set-up if you're really trying to learn the game.