There is a larger problem, but what you are saying is correct.
Mang is just the first weapon that had a “destroy all armor” aspect. The other ones are generally better because they either improve a different stat or the entire team.
But Mang is a weapon every player can get. The other weapons were only available during an event, and now maybe once or twice a year players get a chance to spend $5 to get one.
So if a player started in the past 4 or 5 months, it turns out Mang is their only scaling weapon. The Doomed weapons also help but are similar to the event weapons: there are 6 useful ones out of 12 and given the current rotation, you can only get them once per month over a 3 month period that only happens every six months, one color at a time.
It’s worse than troops have ever been. Even before Soulforge, we knew if you spent “enough” money on gems, which was always possible, you could get any troop you were missing. And if you waited “enough” time you’d get it.
There is no guarantee of that for these weapons. You can’t spend “enough” money to guarantee it because they are randomly selected and show up 1/week out of more than 50 other candidates. If you assume it will take longer than a year to get any one weapon, statistics support it.
Do you think a new player wants to be told “the competitive equipment costs $15 and you’re going to have to wait more than a year on dice rolls to get it”? I wouldn’t. If I had started post-Yasmine’s Pride or post-Earth’s Fury, I think I’d be highly motivated to go find another game right now.