They can't be that bad
A few things with the dispossessed first bugman + rangers is usually an auto add. they have good artillery check out the flame cannon.
a 1k list
id probably run is
Dwarf lord on shield bearers
rune lord
bugman
warriors x 10 great weapons and shields
warriors x 10 great weapons and shields
Quarrelers x 20
iron drakes x 10 with the leader holding a drakes cannon (d3 wounds again normal stuff
d6 wounds against monsters for the drake cannon)
game plan is pretty straight forward warriors are your cannon fodder/ line holders
drakes assist the warriors as they can double tape if they don't move they hit on 3+ wound on 3+ and with the rune lord to support your looking at rend -2 or the drake cannon rend -3
bugman and the quarreler units pops out where needed any where on the board 9" away from enemy and shoot 40 shots into what ever you need dead
Lords ability to give +1 wound to a specific unit for all shooting and combat is pretty huge.
I'm not saying they are top tier there are many armies much easier to use but they can still hold their own.