I couldn't agree more with the OP!
Now, here's my tuppence worth (probably an accurate appraisal!)
Here are some examples for us to examine, if we wish:
1:
"There are way too many Romulans."
Long story short: I recently published a set of 3 (one ground map each) dailies to go alongside the ingame KDF Empire Defense missions.
Kahless/Federations: 6 groups.
Azure/Romulan: 6 groups.
Chos/TrueWay: 7 groups.
Kahless gets 5 stars.
Azure gets 1.
Chos gets 5.
Okay, says I. Azure must be broken.
Check out the review. Nope: "Way too many Romulans."
My first response is "NO. There are not. See for yourself. There are 6 groups, just like on the Federation mission that you
just gave me 5 stars for. THIS is the type of review to I would like to ignore completely. Someone who understands how the Foundry works would not have left this review."
BUT
We cannot force people to use the Foundry (nor should we), and so we cannot avoid reviews like this. I am going to ask the person what they meant, and maybe see if they might change the rating if I can change it, or whatever.
Did the map itself simply feel cluttered?
Were the respawn points poorly placed?
Did they mean that the placement was crowded?
Because they're all completely different issues.
But
they don't know that. They're using the terms that they
do know to communicate what
they thought was wrong with it. And what more can they do, really? As the Author, it's in my benefit to find out what they meant.
So I would LIKE to ignore it, but it's an opportunity for education:
Mine, as to what the person means, and
the person's, because they might learn something about the Foundry. Or not, or whatever. The point is that it's done in the spirit of cooperation.
Also, in this example: I've overlooked the fact that the person also gave me two 5 Stars, and that they played 3 of my missions the first place - they spent time on my work (getting it closer to leaving the review stage),
and gave me some attention and feedback. Really, that's kinda neat (as Archie Andrews might say, if he played STO).
Don't overlook stuff like that. It's important, because you
need to look at the good stuff too. It's important for your sense of worth as an Author. Don't overlook stuff that makes you feel good! Not to sound like a Deferi, but balance is important.
And just like you spent time making it, they spent their time playing it. They could have been farming STFs or lockboxes instead. Yes, you probably spent
more time making it, but they definitely spent
their time playing it. As a Consumer, they just want a product that they enjoy. As an Author, it's up to us to give it to them, overcoming all the restrictions that are in our way. Even when 'their knowledge of the Foundry' is one of the restrictions.
You don't need to know how a music studio works to know whether or not you like a piece of music, and this is essentially no different.
2:
"Your time limit is wrong"
I had no idea what this meant, so I mailed the person and asked them. They replied "You say it takes 45 minutes, but it took me well over an hour."
Firstly: They played my work for over an hour. I want to give THEM dilithium, dang it! Can I give THEM 5 Stars? AWESOME.

Credit where it's due, eh?
Secondly, no matter what excuses you use (valid or otherwise) you cannot control other people's experience of your work, only influence it. That's part of being a creator. It's the best part, I think - everyone gets a different experience, because everyone is different.
Finally, in both cases (1 and 2), they didn't make it a personal attack. They simply said what they thought the problem was, and
left it at that. That's how do it: Stay classy, reviewers.
In conclusion, I would like to state that I don't know how to close essays properly but I've said everything I wanted to.
(*PLUG* Defense Extra: Azure is the KDF one with "way too many Romulans", if you wanted to judge it for yourself. Currently still in review stage. *PLUG*)