She’s an addict.

Im not sure how to start this but bare with me it might be long. My mother had been addicted to Meth since I was 8 years old I’m now 23 years old she got sober for 2 years when I was 12 but went back on it I’ve lived with my dad and grandparents since I was 8 she never would call for birthdays, holidays etc. But I would still reach out to her to beg her to go to rehab but she would never give in eventually I gave up begging her and told her to never contact me again unless she goes to rehab, well apparently the person she was doing drugs with kicked her out of their house and became homeless for 2 weeks and she showed up my sisters dads house oh yeah I forgot to mention I’m not her only child I have 2 sisters who are In middle school and a brother who’s in high school (he stays with his dad). But anyways she showed up there today and told him she wants to go to rehab. So we tried to take her but they don’t accept people on weekends so I have to wait till Monday.. they had a few requirements to enter i guess she needs at least 7 outfits . So my boyfriend took me to buy her some clothes I bought her pants , underwear, bras, shirts ,socks and pajamas, pillow and blanket. So I took it to her to show her since she’s staying with my sisters dad till Monday. I couldn’t believe how ungrateful she’s being she told me that the clothes I bought her are ugly and she don’t like them , I was so embarrassed it felt like a slap in the face my boyfriend spent 170 on those clothes since I’m not working I have a lot of mental issues I have to see a psychiatrist monthly which I’m sure has something to do with my childhood. She didn’t even say thank you . I wanted to grab everything back from her and tell her to stop being ungrateful because I don’t owe her anything the only reason I didn’t Is cause my little sister was right there. When I left I was crying, I felt like I was dealing with a stranger... to me mentally my mom died a long time ago. I know it sounds mean but after so long of wanting her to go to rehab I don’t care anymore. I feel like i won’t ever be able to get over the fact that she wasn’t there for me and chose drugs over her kids. Am I wrong for feeling this way ?