Has anyone been able to play as Sudreyar or Gwined and actually have a decent game let alone win ?

No mods at all and followed the medium sized unit's. I've played at least 40 campaigns for each.

As Gwined no matter what you do Powis always declares war on Mierce (only the 2nd highest ranked military faction at the start with 2x12 stack armies) ....... nothing TOO hard right. Or you can break the alliance sit back and watch Mierce just roflstomp Powis and any other Welsh faction that dares to join Powis after which suddenly because you're also Welsh they decide to roflstomp you. Game over by turn 40.

You can't even build an army greater than 8 units otherwise lmfao food shortage for 15 turns and uprising galore and even if you don't build an army and just take out the rebels at the start you still end up with -10 to -20 food production so you have to disband 2 or 4 units so you're left with 2 to 4 units in your main army. Meanwhile Mierce continues on its roflstomp and you can only sit there and hit end turn because even your income is pitiful and not enough to actually build anything OR negotiate anything with other leaders ..... they all find everything ..... INSULTING.

Heck I even tried sailing for Dyflin and take out the central island on my way there. Awesome got another whole province to increase food and income. Rofl nope Mierce decides to invade your home province cause roflstomp you're welsh and Powis decided to go toe to toe with the mighty beast with their awesome 4 unit army stack.

Or Dyflin launches a 16 stack army and just blockades you on the island ...... like as if your 8 unit army has a chance in hell. You might manage to beat it in one skirmish and get a short reprisal BUT nope here they come with another 10 unit stack while the other army just sits back and raids or sails away to replenish.

OR you can break the alliance when Powis asks for your help to join their war against Mierce (lol did Powis's leader go on a massive bender the balls on this guy) play super conservative and not do anything and just hit end turn and accumulate income. Mierce might attack you or they might not depends if they want to have some mercy on the Welsh nations (pun intended). BUT by the time you have a sizeable army (I'm talking 12-16 units) they already have 2x20 and at least anther 2x16.

Also god forbid you ever press auto resolve because lol your 14 unit stack army will always lose to a 6 unit army because lol your units are dumb (if you manage to get lucky and survive that long).

How broken is this ? Oh I forgot about Sudreyar ........ meh its even worse you might as well just bend over and pull your pant's down.