Ok, we know: Star Trek series never had the biggest budget. And without CGI it is hard to portray robots that move and talk. But the robots in this episode are very cheap and ugly. Even in 1950s B movies you had better looking robots. Here we just have a lifeless tin mask and the rest of the robot is covered in a sweater and trousers. I just never had the feeling that Torres is interacting with a humanoid machine. Those low budget props are killing any immersion and seriousness.
In this episode we have the typical Terminator scenario: Machines turn against their builders and destroy them. Same thing we see in The Orville with the Kaylon. Here two species obviously built robots to fight their wars. After one of the builders have been destroyed, the other builders wanted to shut their robots down and end the war. The robots though saw this as an act of aggression and in return destroyed their own builders. Now the two opposing robot factions keep waging war. But unfortunately for the robots they are about to slowly go extinct. They capture Torres to force her in developing a solution for them to be able to reproduce themselves.
And then we have the typical Prime Directive dilemma. Don't interfere with alien species and their evolution for you could change the power and equilibrium. Of course this is what the one robot faction has in mind: Overwhelm the other faction with more robots. Torres in the end stops them from being able to do so when she destroys her own creation. It is like Frankenstein and his monster. She realized she had created such a monster.
All in all a story that has been told a hundred times. The problem with Voyager in my opinion is, that the crew is lost far from home and has to find a way back - but they never really get hands on technology, information or new life forms that help them on their journey (besides Neelix and Kes). It would have been interesting if for example Torres would have taken the prototype with her and programmed it in a way, to become a member of their crew - without the urge to fight and kill. While it might be difficult to add more characters to the crew while traveling home, it could have also allowed them to spice things up and make the whole undertaking more epic in the long run.