My explanation on how Jack and BT were able to one(two) man army the entire campaign.

Starting off, the most logical answer is that it's a video game and it's main purpose is for the player to have fun feeling like a baddass.

But, here is how, taking into account the titanfall universe's logic, how Jack and BT were able to pull off what they did.

The answer is quite simple, the first point is IMC and specifically Marder's arrogance. Marder made a critical mistake underestimating Jack and overrelying on his apex predators to deal with the problem. Why exactly he did not start going full panic mode and throwing everything he's got at Jack and BT after losing multiple of his "elite" mercenaries to them is beyond me...

The second point is somewhat more personal and headcannonish so correct me if I am wrong in any way. That is that not all pilots in the Titanfall universe are wall-running, double-jumping, gun-running baddasses like the ones we play as. Most combat certified pilots are simply soldiers that have received titan operation training and are not that much more skilled than the average grunt. That mostly applies to the IMC's military due to them having the production capacity to mass-produce titans for frontline use. That is also the reason why we don't see any enemy pilots ejecting or fighting on foot, probably due to a lack of ejection seats or training to take on a titan. Jack proved to be an exceptionally skilled Rifleman, so the pilot gear and titan boost he got from Lastimosa was enough for him to even the odds. On the other hand, the militia have much more restricted production capability so they reserve titans for elite units such as the SRS. That is not to say that the IMC doesn't have titan pilot special forces (which Marder should have probably used to slime out jack and BT, whoops...) , but they can still afford to deploy frontline, mass produced titans like normal military vehicles.

Let me hear your thoughts on this.