I absolutely agree that people can't help how they speak. My issue is more with how bad the representations of those accents is in programmes.One of my friends regularly starts slimming world and posts all her meals. Then tags me in their all in comments. I mean, yeah I’d say I’m a chubster but not mega owevweight. I’m a 14 and misntain that. I also eat well in the week and relax at weekends so don’t feel like so need advice.
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I am not a fan of the brummy accent, even though my family are from close to there. They have a slightly different accent but similar. But people can’t really help they way they speak. It’s not their fault that they were born there and have that dialect.
With regard to your mate tagging you in stuff. Could you tell her to stop? (I realise this can be a bit delicate at times). You might be able to find a polite way to tell her that whilst you're glad she is taking control of something with herself she isn't happy with, you are happy with how you look and don't feel the need to diet. It might shut her up for a bit.