No, it isn't, and we could do without the condescending tone.
You have made my point for me. Getting to level 50 is not an amazing achievement. Although others here disagree and say it requires significant effort.
Yes, that is what it is named for. All the equipment you get from leveling past 20 is from the story mode. The hat follows the exact naming convention of the rest of it. Captain Cuttlefish is a veteran of the Great Turf Wars and wore his hat then, so the hat is therefore also a "veteran" and "legendary."
You can argue they gave you such an "important" hat for reaching 50 because they want that to feel important, but it seems a lot more likely to me that it's there merely because that was the level cap they chose and you gotta put something nice at the end.
S+ is the prestigious mode. Not sure why the mere levels need to be one, too, when they exist soley to gate a minimum of experience for Ranked and to unlock equipment and provide a sense of progression along the way.
I wouldn't mind having levels past 50, but unless they add more non-overpowered equipment, it would literally exist for no purpose but to fill a meaningless bar.
Anything that amounts to a mindless time sink is not an achievement, and since we already have a mode specifically to show a certain level of achievement, I see no reason the gear unlocks must also be one, or go to higher levels for nothing.
