Ii question regarding my mother

I have a ion question regarding my mother.

She is a 52 year old and recently she is acting really stupid. Like really stupid. Last night she got sent a message claiming to have won a big amount of cash through Facebook, which ended up being cancelled and her account getting hacked. I saved her more than once from scammers but she was really adamant that the winning prize was "real,". She said of course money doesn't matter but got mad when I tried to explain why this is a bad idea. She got defensive saying it will be her own fault if she gets scammed/hacked. I gave up and just let her deal with it if she does get into such a situation.

Thank goodness that bank details weren't shared, but it fustruated me that she let's herself be vunreable to the point where she makes mistakes she has to fix.

She also asks me to spell SIMPLE words for her like "tend" for example when she could simply word it out loud and figure it out herself.

When she made a new Facebook page, all she had to do was fill in very simple steps that only take one click and she asks me to decide what she wants as if I read her mind.

She stopped cooking for my 15 year old sister, i am 29 so I can pretty much take care of it myself. She is also a heavy smoker and said cigarettes help her to get through the day. I mentioned the health issues that come a lot with it but she says she can easily quit smoking In Wich she has in the past. But started smoking again recently.

Her hygiene is declining. Only taking a minute long showers and always smelling like smoke (gross)

Gets mad at the smallest shit. In conclusion, my mother is acting like an undeveloped child. It's quite pathetic honestly.

(Note: no my mother does not have dementia, etc. She's just being dumb. )