Janeway and co keep getting criticized for ... while none of those guys ever get criticized for ... which shows that the audience didn't WANT them to do ...

OK, see, you're doing that thing again. You're making black-and-white inferences, putting words in our mouths, telling us how we
would have reacted to nonexistent plots, etcetera, etcetera, etcetera... It gets really tiresome so I'm not even going to bother with it; from now on I'll just skip over those parts of your posts.
Anyway...
What's more awesome and heroic:
- Saving the known Galaxy from powerful invaders and other major space threats (TOS and TNG)
- Fighting a massive war for survival against a powerful foe (DS9)
- Doing nothing but looking out for yourselves on your single-minded quest home and not getting involved in any local affairs or doing anything big and awesome because the premise won't allow it (VOY).
The problem is you're confusing the premises with the specific episodes.
TNG's premise wasn't the Borg. DS9's premise wasn't the Dominion War.
The premise of TOS and TNG was exploration. The premise of DS9 was running a station next to a wormhole. The premise of VOY was a lost ship going home. You could describe any of those to sound boring like you did with Voyager:
- Doing nothing but exploring planet after planet on your single-minded quest of exploration, not getting involved in anything long-term because the premise won't allow it (TOS and TNG)
- Doing nothing but sitting around on your little space station and not getting out and exploring anything because the premise won't allow it (DS9)
You haven't shown why VOY's premise would inherently never allow it to be "awesome and heroic" like TOS, TNG, and DS9. All you've done is compare how the shows themselves turned out.
Maybe if it turned out Janeway was some prophesied Chosen One who was destined to destroy the Borg and change the face of the Delta Quadrant ...
Okay... I don't understand what you're trying to argue here. You seem to have forgotten it yourself. You said VOY's premise wouldn't have allowed it to possibly do anything awesome. Yet here you are, using your imagination about something awesome that could have happened. You're contradicting yourself.
They still had the Federation to fly around and enemies of the Federation to run into.
That was present, but by far not the focus. The
majority of TOS and TNG episodes weren't about visiting starbases, or Klingons, Romulans, Cardassians etc. It was about non-Federation worlds and new discoveries. It was about "always moving" and never staying at any given planet for too long. What you're calling a fatal flaw of VOY's premise had already worked for 10 seasons of Star Trek before VOY came along.
What makes them "special" and "elite"?
Flagships, higher-up Fed personnel commenting on the importance of the crew and their achievements, flashbacks to awesome things they did, etc.
What precludes other crews from being "special"? Why do they need to be the flagship to have anything interesting happen to them?
All that stuff I just said.
No... all the stuff you said merely describes the effects of being "special". It does nothing to explain why other crews can't be that way, or why interesting things can only happen to flagships.
Are you saying Starfleet would consider Voyager low priority and thus staff it with nobodies? It was designed for exploration, just like Enterprise. And why does this so-called premise flaw apply to VOY and not DS9? There would've been no reason to prioritize that crew either, because they didn't know about the wormhole until after the station was already staffed.
When was the rareness of the Enterprise ever an important part of a story?
All those "We're the only ones in the Quadrant" stories, all those stories where they run into other important Ambassadors and Captains and Admirals that they befriended in the past, etc.
Yet, those stories never actually stopped happening, so there goes that theory down the drain. In the TNG era they were still often "the only ship in range", which makes sense* because space is big. Really big.
*Except for that time in Generations when they were smack dab in the middle of Federation HQ.
And Picard had some high-up friends too.
But we're getting off topic. If the reason the ship's status is important is so it can be the only ship in the area equipped to respond to some situation, then VOY pretty much has everyone beat in that department, since Voyager is the
only Starfleet ship in the entire quadrant, and the original premise had them being the only people in the quadrant with higher tech, too.
Odo's importance wasn't part of the premise.
It became an important part of the premise and his importance/mysterious past was hinted at throughout the show until the Founder reveal.
Again, you're confusing
the premise with
what they did with it. The premise said that Odo was a mystery; that's all. VOY's premise didn't preclude the writers from adding similar importance to members of Voyager's crew. It was just as open-ended. It had 2 never-before-seen alien species in the regular cast.