If you try and look on google, there's actually no other response on the first results page to 'most decorated american unit in WW2', and this one unit is referenced by a number of different sources. By all means try and find the unit that actually beat them out in gross numbers, I would not be surprised if one existed.

If I had to guess what the above statement means, it maybe means there were either much larger regiments that earned more decorations in a similar time-frame, or, more likely, there are long-standing units that existed for decades and had a revolving door of personnal, and if you total them up from several wars where there were probably completely different sets of soldiers, then maybe they beat out this unit.

But that would still leave this unit as 'most decorated, man for man, while serving cohesively in a single war.'

Which would seem to beat out any other criteria if you wanted to know what the most impressively decorated unit is.

Now that's probably the actual answer for any third party reading this, but you're definitely just trying to diminish and undermine their accomplishments, so you can fuck right off.