"Crafting" in this game is just pure gambling ?

https://preview.redd.it/pgve9ufxbwee1.png?width=108&format=png&auto=webp&s=15675353ac4f7ba9c1a0ef6a8437d5293db3e527

I know, there are Omen for a very specific use, but I've never found a single important one like the one that removes only the lowest lvl mod, for example. This is my first ARPG and I'm discovering this world and I'm lvl 90+. Everything is super cool, absolutely everything, except the crafting part, which for me is just gamble.

If you really want to craft (and again, it's all a matter of luck), you have to spend tens or even hundreds of div. I'd like to know if the majority of people think like me or if I'm doing things wrong? I'd have to play 15 hours a day at 1/2 div a day to be able to buy ONE Omen in 2 weeks?

edit: I dont know how many div you find on 15h session i only play 2/3h per days. No, i dont want Mirror BIS all stuff. But just want to remove a bad mod from my litle crossbow and try put a better (i would love essence for rare item) . But i dont have 300 div to do this simple crafting operation, again: actual crafting seem to exist only for very rich player