Don't ever underestimate yourself, and if they offer you the job - take it.
They will know your employment history now,
they'll know that the job's not going to be an easy one for you but ..... by taking these unsuitable jobs it does give you ...
a) the experience and ....
b) it will show you what you can and can't do/achieve ....
And, it will show on future CVs that you've the confidence to at least 'have a try' at something.
You could use it as a 'stepping stone' until you find something more suitable - and, it's far easier to find jobs when you're already employed - don't know why, it just is !
Sometimes we have to give ourselves a good 'talking-to' and muster up some confidence from somewhere to do these awful and unsuitable things ....... think of the money
(Incidently, the awful job i did was telesales .... it was the most horrible job i ever did, was ***p-useless at it, did it for just a few months, hated every second but .... it had to be done, at the time
)