i agree with sandworm,everyone has some form of intelligence-ive spent my whole life with people all over the ID spectrum including profound and even they were clever in areas.
im 32 and have mild intellectual disability,i was diagnosed as having severe intellectual disability as a child but when i was sectioned [held against my will] in a intellectual disability hospital in the UK 5 years ago,i was tested every day for the 4 months i was in there including having my functioning tested and my parents were spoken to indepth,
it turned out i have mild intellectual disability which didnt surprise me but i wasnt able to talk at the time to say my opinion due to my classic autism.

it sounds like you may have executive dysfunction which can come from having ADHD as well as other conditions although i dont want to 'armchair diagnose' you.
when your VIQ and PIQ are very different it means theres something causing the imbalance such as specific learning difficulties [you may know them as learning disabilities in the US] so its highly possible your not lower IQ.

you need better self confidence,you are not your IQ,the world is yours if you let it be.
you need to know your potential even more than your limits, so you struggle with a degree-if you cant get support with it like many people do in the UK dont do it because you are setting yourself up to fail,look into other non degree courses instead.
have you thought about doing voluntary work? a lot of people get into paid work this way,despite being intellectually disabled and being unable to write plus moderately classic autistic ive actually been given a voluntary job as a support assistant in PE lessons in a special school,im also a special olympics athlete-i dont let my labels stop me as id have no quality of life otherwise,you can use a computer obviously ever thought of getting into IT,there are jobs like fixing computers which are very cool and you can do that independantly without any qualifications as long as you learn.