Is it wrong to be fed up with someone’s mental health struggles?

My cousin has been struggling with her mental health for as long as I can remember. Years. Probably 10 or more years. She is the most negative, depressing person. Literally always upset about something. She has an amazing husband who has taken over everything because she cannot/will not do anything. She also willingly had two children (meaning she tried to conceive them), and is not involved with them at all. When she speaks of them, she just complains about how hard they make her life. All she seems to care about is traveling places, but says her kids don’t allow her to do that anymore. (Money/ability/childcare, etc). On Thanksgiving my family does this tradition where we all say what we’re thankful for in a video. She said “my husband and my dogs”. She did not mention her kids at all. They’re only 5 and 3 and despite not working, she sends them to daycare all day every day. She says how annoying they are. How they never shut up and leave her alone. She tried to kill herself last year and spent 3 months in an inpatient facility. She said it was a welcome break from her children. She has been to so many psychologists, therapists, has been on so much medication, but NOTHING has changed for her in YEARS. Whenever she comes around it’s just a pity party. Everyone has to tip toe around her or she bursts into tears and an explosion of anger at the drop of a hat. She has an Instagram page pull of artsy selfies of herself and her dogs, never of her kids, her family, with captions like “going to get away from this mundane existence one day”. I’m just over it. She has been given so much help and sympathy over the years but at this point it seems like she wants to be miserable. I hate being around her. I hate seeing what she’s doing to her poor kids. I’m starting to hate HER as an entire person. Tell me. Am I wrong here?