The actual timeline of every time Pharma saw Drift:
During the Delphi episode when he wrote "your friend is upset" to Ratchet through the sound-blocking quarantine chamber, it wasn't about Drift, it was about Pipes.
Drift is standing next to Ratchet at this time, but when Ratchet lets Pharma out of the quarantine chamber, Pharma doesn't stop or even look at Drift at all.
Then as soon as Ratchet let him out, Pharma immediately ran to let Sonic and Boom out of prison, got yeeted, watched as Fort Max killed both of them.
Pharma is paying zero attention to Drift, he is a non-entity, he's just another random guy afflicted by the plague. Drift is on the ground dying and talking to Ratchet, but this is completely on the side because Pharma isn't even looking at him or speaking to him at all, he just immediately pulls the gun on Ambulon.
Shortly after that, Pharma got exposed as the source of the plague and he shot a life support machine and ran down the hidden passage.
From this point on, Pharma isn't even in the same place as Drift until he's hanging on the rooftop about to shoot Ratchet, where Drift intervenes at the last moment and cuts off Pharma's hands so he can't shoot Ratchet.
Pharma has never heard Drift speak because he was in a sound-blocking quarantine chamber or in his secret lab when Ratchet was talking to Drift. He wouldn't know what his voice sounds like. In the heat of the moment (including aiming through his scope at Ratchet), he probably didn't even see that it was Drift specifically who cut off his hands. Pharma's head is barely above the edge of the building because he's slipping off it at that moment, so it's not like he had good eyesight of Drift even if Drift wasn't so fast that Pharma didn't have time to shoot. Everything happened so fast that Pharma probably got a glimpse of him at best before he would've immediately been more preoccupied by the fact that he was literally about to die.
On Luna-1 when Pharma brings up why he's mad at Ratchet, he specifically and ONLY says that it's because RATCHET stole his hands. He doesn't mention Drift at all. He doesn't even acknowledge that it wasn't Ratchet personally who cut off his hands. He's angry at the theft of his body parts (and also probably about being left behind).
Not a single mention of Drift. He doesn't even make a distinction between his hands being cut off and his hands being stolen. Doesn't even mention that it was someone else who cut his hands off and Ratchet only took the opportunity to steal his hands after. He's only angry at Ratchet. Pharma specifically says that he's angry 1. because of Delphi and 2. because he views Ratchet stealing his hands as a violation of his body.
The next time Pharma is at any proximity to Drift is when Adaptus is body-snatching him and the only part of Pharma left is his spark (got his head blown off by First Aid), at which point their consciousnesses are fighting each other for dominance and this individual is simultaneously Adaptus and Pharma, or Adaptus slightly influenced by Pharma's desire.
"But Squiggle, Pharma-Adaptus ordered Drift to be shot! Surely his subconscious bias was influencing Adaptus to hurt him specifically!"
WRONG! WRONG WRONG WRONG!
Adaptus, while piloting Pharma's body, orders his soldiers to stop "THEM" not "HIM" and then multiple of his soldiers fire on THE ENTIRE LOST LIGHT CREW, which you can clearly see because Rewind, Nautica, and Swerve also had to duck/run to not get shot, as there were multiple shots being fired from an entire squad/firefight. Drift is just the only one who happened to get hit. The order was never to shoot Drift and Drift alone. Adaptus-Pharma never even implies through his words or his body language that he identifies Drift in particular among the crowd period.
A few panels later, Adaptus-Pharma even signifies that he's the one primarily in control of their body here, as Pharma is merely "trying to assert himself." So the idea that Pharma was somehow influencing Adaptus to shoot on the Lost Lighters makes no sense. And again, Adaptus-Pharma never shot anyone himself, he gave the orders for his soldiers to shoot, so how the hell could Pharma be responsible for someone else shooting Drift alone in the middle of an entire hail of laser fire?
It's not like Adaptus had zero reason to shoot the Lost Lighters. Bro had no idea who they were and no reason to keep them around if they might interfere in his plans.
Pharma seems to only be capable of influencing Adaptus in small ways, like bringing the prisoners to see him.
When Adaptus-Pharma singled out anyone among the crew, it was, guess what, Ratchet again. Not Drift. We don't even get to see if Drift is standing next to Ratchet in this specific position, but it's not like it matters because he's so irrelevant to Pharma-Adaptus that he's not even looking at him! He's literally only looking at Ratchet!
In conclusion, from Pharma's very first appearance to the very end of the comic, he gave zero fucks about Drift. He barely even knew his name. He never paid him any attention except incidentally. Pharma ONLY pays attention to Ratchet on multiple occasions and explicitly spells out that he's targeting Ratchet either 1. as revenge for stealing his hands or 2. because he remembers him as his beloved even after having his head completely shot off and while bodysnatched by someone else.
Pharma isn't Ratchet's petty ex who hates Drift.
Pharma never once brings up Drift as a motivator for his actions.
Pharma doesn't even know Drift's name much less who he is or that he's a competitor for Ratchet.
Y'all can stop writing Pharma into Dratchet fics solely to be an evil ex/spurned lover who hates Drift any day now.