Hi UM, you're there for help, now if it's not working very well for you it's time for THEM to "step up a gear".
It's not that you just couldn't be bothered with the assignment, it's that you had REAL difficulties with it. Now it's good that the areas you're having difficulties with are being highlighted so as you can get more "appropriate" support.
Now the old story just like with school or college, there are always going to be people better at things than us, it happens! So yes there will probably be people who easily pass the assignment but you know that doesn't say everything about them.
And given a different assignment, or the support you need to do it as yourself, you might have passed a different assignment even better than them, or put much more effort in than them (which passes you better than them in my book! ).
So hey, maybe they haven't had the difficulties you're having, so big deal if they do pass easily (not much of a challenge for them!).
So hold your head up!! You're giving this a go!! You're there, you're letting them know where they could do better in making the DBT work for you!!
Really you're all part of the process in helping them realize how they can improve the support they're giving both to you and maybe to others!! You're a driving force!!!
Just make sure you get any additional help you need to complete your assignment.
Best wishes
Alison