I'd love for you to explain and expand my views. Im not unreasonable in the slightest. I'm quite the pagmatist and the one people come for brutal honesty.
But I'd love most of all is for you to even attempt to explain how a game literally with its core mechanic is dice rolling (functionally the most true random you can get in terms of results) isn't rng. Especially when I even acknowledged that you're able to MANIPULATE the chances on dice rolls.
This will be good
Yes, RNG is always going to play a factor in this game but it doesnt play a consistent factor. No one is consistently losing because the dice isn't going their way, they are consistently losing because they are putting themselves into situations that are unfavorable. Also, rolling dice is a core mechanic of doing damage, and doing damage isn't how you win games.
This game is won and lost in the movement phase and deployment. You can win games without rolling a single dice. Obviously, the game also doesn't have the greatest balance in the world but if you're bringing a janky list IMO you're accepting that there are some games you just won't win without a ton of luck.
For example, your reference of "20 wounds off my behemoth in 1 turn and then 20 off another in a double." This tells me that you did nothing to mitigate their first turn threat range even though you apparently weren't going to be able to do damage yourself, or you didn't have enough screens/throwaway units in your list to hold points while your important stuff could stay safer. That's a tactical and list building problem, not an RNG or double turn problem.
Granted, there are always situations in this game where damage is unavoidable but you're still trying to mitigate it as much as possible or set a situation up that allows you to trade more favorable in the following turn.
I've found that players who fundamentally put this game down to RNG generally aren't putting themselves in the best positions in the first place.
Full disclosure, i thought "this will be good" was incredibly rude. If you wanna blame your losses on RNG be my guest, but there's a reason good players win most of their games and there's a reason good players with bad armies and bad luck will still beat bad players with good armies and good luck.