(new player) Dwarf Campaign defeat in 10 turns, normal difficulty. is the game meant to be so stacked against the player, Or am I not understanding something?

Completely new player, new to both the fantasy Warhammer side and total war games

I got the game yesterday and the whole reason I got it was because I really wanted to play as the dwarfs, they look incredibly fun and various instructional videos said they are very strong to boot.

I start the game as the book of grudges dude on the chair, secure the two nearby settlements as instructed and then two goblins from the next city almost immediately declare war and rush me, their armies are **incredibly powerful** compared to anything I can muster.

They have a thousand odd troops, and a giant spider monster that I can barely defeat but by then every other force is low health and exhausted.

They reinforce each other if I try to fight them and the battle preview screen only ever tells me it's a decisive defeat.

I've loaded this campaign seven times over, I've tried everything I can think of to beat their forces, meeting them in open battle early only gave me a valiant defeat prediction.

I tried garrisoning the walls of my city, and even had a separate lord I made with some basic troops to try and re-enforce and nothing works. And of course as soon as I'm defeated, they effortlessly destroy my capital and I lose.

I don't understand what I'm doing wrong, as I've said before I'm new to this series but surely it's not intended to be so difficult?