Given the excellent reviews this series has received, I must be missing something.
Yes, the production values were good, but the script was terrible.
For the first few episodes I kept wondering whether the writers were deliberately making the resistance workers seem incompetent, but eventually I realized that it was the writers themselves that must have lost contact with reality.
Some of the ignorance was simply a lack of research (e.g. even a casual look on Wikipedia would show that rather than exploding, Molotov cocktails work by spreading burning gasoline when the glass container shatters, but the characters simply rolled the bottle under a truck without even attempting to break it.
Similarly, hand grenades have a lever that, when released, automatically opens and starts a timed fuse, but the characters were told to count to three *before* releasing the lever).
By far though, the worst writing was the way the characters would continually tell each other what they and others had done and were going to be doing.
It seemed like they were trying really hard to ensure that no matter which one of them got caught, that person would know all the secrets of the whole organization.
Can you imagine in real life someone telling you something like "Joe Smith is going to meet Herman Perkins, the secret head of the resistance, tomorrow at noon at Granny's Café so they can discuss the border tunnel they're digging in Smallville"? That conversation wouldn't have been out of place in this program.
No underground organization could work like that, at least not for long.
If someone doesn't need to know something, they shouldn't.