2:28: I'm mostly going to skip past this fight, but as a small reminder, WWT does more damage the further you are from a player. If you have it up, you should back up to get value, then dash back in with High Jump to get back in melee range. There are honestly a lot of mistakes in this fight, but this fight is incredibly sloppy on everybody's part. You probably know this, but as a heuristic, if you're low and going to elixir, it's probably a good idea to just take the potion on the ground before you get poked and denied by an enemy team member that can do that. Honestly, I think potioning here, even with your health this low, is incorrect; your team has a numbers advantage, your team has limit breaks up, the enemy team is relatively low, and you get limit break at a prime time to do substantial damage to the 3 on the point. Remember, Sky Shatter gives you a 25% max health shield, and if you really need to, your Chaotic Spring will probably be off cooldown when you land.
3:28: Turbulence happens around this time, and this means a couple things; either the enemy has just taken 30k damage, or the enemy no longer has guard. This is the single best time for a Dragoon to limit break, and every time you are on Cloud 9, you should be thinking about whether or not this is an option. While you do eventually limit break, you do it slowly, you do it late into turbulence (i.e. closer to when guard comes back up), and you do it in full view of 5 members who have already signaled that they want to kill you. Generally, if possible, you want to use Sky Shatter when the enemy isn't paying attention to you.
4:54: This positioning, where you walk up into the enemy spawn and around the corner away from the support of your team, in order to melee range WWT, should have killed you way sooner than it did; you are so far beyond your team's ability to help you when you move around the corner near the end point that you are essentially 1v5. The only reason this didn't immediately lose you the fight is because your Ninja did the same thing 10 seconds earlier and already lost it for you. Try to be mindful of where your team is positioned and if you are putting yourself in immediate danger.
5:51: Bluntly, you should have lost the game off this play alone; you dive in 1v5 without having gotten your limit break off and so far from a position where your team is available to support you that you basically immediately make the fight a 4v5 having contributed almost no value whatsoever. You should probably wait for your White Mage to limit break first to utilize the space that the AoE stun provides to make this play safer.
for what it's worth, i am also guilty of doing this, and i have lost so, so many games from doing this exact dive (to the people in revival reading this, please understand)