NEED HELP LIGHTNING ARROW DEADEYE BUILD

I'm currently following Fubgun's build for LA, but I feel like I'm 1) doing 0 damage and 2) dying way too fast

I'll include some images of gear below but I've pretty much been trying to swap bow/quivers and skill gems as well, but it takes me like 6 hits to kill normal mobs, I die pretty easily because I do 0 damage and LA itself drains so much mana that I can barely play the game (and I'm only at act 3).

===============GEAR===============

I guess first thing u could try is to get a bow/ quiver with 2 good stats instead of just one. Farm an area u clear fast for Lucky ex, some gear with qual etc to just buy a cheap bow

https://www.pathofexile.com/trade2/search/poe2/Standard/k2LeMknU5
Sort by weighted sum, there's one for 3 ex currently. Get some mana on kill instead of clarity and switch to heralds of ice/ thunder until boss. Actually read fubguns notes. You need to freeze enemies to start the hoi hot loop.

For using fubgun build, you can use it after you finish campaign or when you start doing Endgame mapping.

Fubgun write it in his starter build "You can swap to this build as soon as you finish the campaign."

My tips for you to finsih the campaign is, try use Gas Arrow Gem Skill and then use Radiant Grief Lace Hood. You will able to finish the campaign faster :)