As a first glance, the cost per unit weight seems about right and the total weight of your sample RW Jammer vs the TL 6 MT Jammer seems responsible for the bust in price.
I would question a bit of apples to oranges comparison since IIRC the MT Jammer jams ALL radio frequencies simultaneously (or any combination of frequencies) so its capabilities exceed those of the real world counterpart. I have no idea how many jammers would have been needed to jam all available frequency combinations selectively, but it would clearly have narrowed the gap somewhat.
Personally, I would have been happy with an order of magnitude correlation between the rules and reality (which your example does not support).
Now I still find 'hate' from the OP to be too strong a term.
Even a bad design sequence is better than a bad W.A.G.