It could be helpful if you can find a way to discuss this.
Often when partners have expectations of their partner or assumptions which they have not discussed or agreed with their partner, it leads to resentment and poor communication.
It will be hard to bring up, but it will enable you to move forward.
Think about what you would like; what are your needs, short-term, long-term, it may be also useful to think about what you might do if they can't be met. Discuss with your partner a solution to move forward. If there are statements like "you should be grateful" then try to calmly explain that you don't feel that way, and that there hasn't really been any discussion about what you both need, so you would like to discuss how your needs can be met. Try to be open to compromise.
It might also be useful to discuss as parents what you think your child needs to make sure collective decisions are made. It sounds like they have very complex needs and behaviours which are hard to manage by yourself. I wonder if there are any options to help them develop in areas which may make your lives easier.
If you reach the end of the conversation and there is no movement forward, then you might want to think about other support routes or if there are other ways you can move forward with your life.
You're not a bad mum or person, you have a tough gig at the moment! Even if you had an "easy life" of no work and lived in the lap of luxury, if you're not being listened to, or want to explore other things in your life this is perfectly reasonable and healthy.