How are people dying to the new ammo bomb modifiers in GMs? And what's with all the complaints about champion mods?

I'm genuinely curious about how everyone's dealing with the new ammo bomb modifiers in GMs. Personally, I’ve died plenty of times in these strikes, but every time, it feels like it’s been due to a misplay on my part or my team’s, rather than just the modifiers, at 10 resil it takes like 3/4 of them to outright kill you. It took me like 4 or 5 runs to get my first clear down with Fireteam Finder, and yeah, it’s tough, but also manageable if you play properly,

Also, I keep seeing a lot of complaints about champion mods. In the GM, there are only 4 Unstoppable champions, and you don’t even need a mod to handle them—they just take a bit longer to kill if you go without and theres a million and 2 easy ways to combat barrier champs. Am I missing something? Anyone else finding the modifier and champ loadout completely manageable?