I wouldn't use the word respect, but I think she will always find it hard to treat you as an adult. That is also about her, rather than because you haven't got a job/ car/ husband or whatever. Some mothers will always find fault with their children whatever they do.

Moving out on your own once didn't work out, but please do think about moving out with other people. I live in England, so my experience is different, but here you could - for example

Work as live in help for an older but wealthy person
Work in a boarding school, with the perk being free accomodation
Work for the National Trust (live in an old historic building but look after it)
Join an eco or green community
Work on a care farm
Work in a religious community - you don't have to be religious, but you do need to contribute in some way

I really would urge you to look into this, even if it's only for a month. It might do you both good to be apart for a while, and you might change and feel very differently.