can't

There's a movie quote that became a meme.  "I know you think you can do these things and you really want to try, but the fact is, you just can't!"  This from a mother to her child who is "differently abled" and trying to find her abilities. In the meme, it's communicated that this is an instantly horrifying quote. That it shocks people that a mother would say such a thing.  Yet it sounds quite normal to me. Even to this day my family are deciding, before I've had time or practice to get good at something, that I can't do it well enough and I shouldn't be supported in order to drive me away from fruitless endeavour for my own good. Meaning I get no support.  Then they also consider me a quitter.  They say things like "you can't do it.  You don't put the time in and that's why, and you'll never get any good at it because you just don't practice enough."  Even while dropping support for a fruitless endeavour, saying nothing unless it's "well meaning advice" to give it up for a bad job.
I'm so not looking forward to seeing them again.  So stressful.  Need money. That's one thing maybe they're still good for.  I offered to paint things for money. If that doesn't do me any good I will indeed give up on them once and for all. It'll be the third and final time I tried to find a reason to put up with them.