However you don't need to be on your A game with comms to enjoy an evening of scenarios. When soloing gets tough find a team on /5 - there's usually a lot of people doing same tier scenarios as you at the very moment. There's no strings attached - just get heals, dps and tanks, make /assist (that's all you need to type in) macro, drag it to your skillbar and keybind it.
Guard. Heal. Debuff. Dps.
Together.
On the same target. Trust me - focus can do wonders. And hey, maybe you'll like the guys you're playing with and next time it'll be much smoother when you play together because at the end of that evening of doing scs you'll start to get in sync. You'll know what the others are going to do before they do it because you've seen it so many times. It's not OP. It's what Warhammer Online really is all about - I've yet to see other MMO where grouping up comes as naturaly as in this game.
Premade is not tryhard elite club - it's a party of people playing together to make things easier. Comms optional

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However if you truly despise the concept of premade there's always PUG solo que option.