system
Given the following post, respond as if you're commenting on Reddit:
human
[Mass Effect] Did the Reapers in the current cycle acknowledge that they could theoretically lose to Shepard?

Yes they were conventionally winning in that by Priority: Earth they were basically overrunning the galaxy but I’m referring to everything that could go wrong went wrong i.e citadel was still out of their hands for the majority of the war, the leviathans were back, they had taken some serious losses relative to other cycles, the galaxy was effectively united and their main enemy being Shepard just wouldn’t die.

Was there any acknowledgment on their end that they could have lost albeit a remote possibility?
gpt
Not on their part, but in one of the DLC the leviathans mention that Shephard is the first person in millennia the Reapers have seen as a genuine threat.

They're arrogant, but not stupid. They know things are not going as they should be.