Your parent not respecting your identity but still doing the bare-minimum to be a parent is not a reason to keep them in your life if they are actively harming your mental health. While some LGBTQ+ folks are able to tolerate their parents despite not being supported, encouraging trans people to allow family to inflict hurt on them in this way is shameful and honestly crosses a line. You should be ashamed of making trans folks feel bad for wanting to have boundaries.