Colonel Green said:
Was Tsunkatse the worst moment in Trek history?
Of course not. It's one of the very best VOY episodes. Compared to the vast, vast majority of VOY episodes, Tsunkatse is
masterpiece. I'd say it's the third best VOY episode after The Void and Think Tank. If one wanted to find the worst moment in Trek history, there are some moments in VOY close to Tsunkatse in the series which are infinitely more qualified. One example of a multitude of possible examples: The Doctor spending a whole episode singing opera to aliens with mental difficulties whilst in a Bozo the clown uniform.
The Rock's appearance on VOY was handled in a classy way. Anyone who didn't watch wrestling wouldn't really know he's the Rock, or that he performed a rock bottom on her. That is to say, the Rock's appearance didn't do anything to detract from the context of the show. Not even a little bit. Besides that, the Rock's acting was on par with or better than any of the main actors on the show. Therefore, his appearance was fine.
Guy Gardener said:
He might as well have been a card board cut out.
And, after saying the Rock was underused in this freakshow, can you imagine the more ultimate disappointment I felt at seeing Jeffery Combs given such a "marginal" role? I know, there are no small roles, only small actors, but frankly, some writers can be fracking small.
I would say main characters on the show such as Harry Kim or Tom Paris - and almost all of the "guest alien of the weeks" from other episodes - resemble cardboard cut-out characters even moreso than the Rock did in his one appearance. So for the company he's in in this episode, the cardboard-cutout writing behind the Rock's character here is just fulfilling the long-standing tradition of such before he came on. But, at least the Rock is a lot more fun to
watch than Harry Kim or Tom Paris or any other of his cardboard character bretheren.

My point here is that the Rock's cardboard character did not
lower the bar of the show at all, so any criticism against his character for being cardboard is merely a microcosm of a series-wide problem, not a Tsunkatse-episode-specific problem.
I agree with you that both the Rock, and Jeffrey Combs, were vastly under-used in this episode and that was not-so-good writing to use them so little. However, I noticed that in their brief, under-used roles, they
still managed to inject more spirit, screen presence, personality, and compelling performances into their small characters than most of the main cast do. Or most of their "one-shot" guest star counterparts from other episodes do. Which just makes me appreciate their performances all the more as a boon to Voyager as a show. Ditto for J.G. Hertzler, who also elevated the Tsunkatse episode far beyond Voyager's usual level of quality.