VS Lui:
No plot armor. It was everyone's first experience with Lucius besides Lain and Shu so he didn't know the barrier could reform and push him away.
VS Ranjiro:
Early Ranjiro is just super weak lol.
Battle Royale:
Yes this is plot armor spooky.
Vs Hikaru and Aiger:
No Plot Armor he literally lost lol, to be fair the loss was by chance. You could say it was only by chance so its plot armor but like no one had a full grasp of his ability so Aiger being able to completely understand while beating Lucius wouldn't make any sense lol.
Vs Silas (and Dante technically):
Triple Twister couldn't it's full potential since only 1 of the three "twisters" even made contact lol. Also it's not really a breakthrough defenses move so it wouldn't be able to break through the ultimate defense.
Vs Aiger:
You could say they made Aiger dumber but using a new strategy when old ones never worked is dumb. Also being able to over Achilles with no attachments is completely do-able.
Vs Valt:
Plot armor spooky.
Vs Shu:
The man literally lost lol no plot armor.
Vs Shu (The End):
He did win but that was reasonable. It was Shu's first time seeing the bey and Spryzen couldn't pull off it's powerful moves due to being countered by the new Lucius.
Vs Hikaru and Hyuga:
Setting up for an airborne Limit Break attack is a very smart move, not a plot armor induced one.
Vs Aiger and Ranjiro:
The opponents put up a good fight but you got to realize Roktavor's not exactly the strongest and it's been shown Achilles get's knocked out easily without its Shield.
Vs Lui and Dante:
Luinor and Dragon bursted not because plot armor, because they were hit at the right moment with powerful attack. Achilles and Roktavor where hit at the right moment with just a normal hit, no special move.