Earlier quoted context omitted.
I used to live on 700 €/month for three years, where I spent 310 €/month on rent (including warm water and heating for a 1-room + kitchen + bathroom flat of 40m²) and saved a further 100 €/month, plus ~50 €/month for university fees (~250 €/6 months). So I lived off (700 - 310 - 100 - 50 = 240 €)/month, which I found to be no particular problem – ~150 €/month on food, toothbrushes etc. (general groceries), 30 €/month…
Did you have a similar mix and quality of clothes at the end of tht period as at the start? Similarly, was you washing machine (if you had one) of similar quality? T.v, computer? It is relatively easy to live on a budget starting from a position where you have all relatively new stuff, and where you have a full closet of relatively new clothes. Also: €25 for eating out once or twice plus clothes?
Tech was relatively decent (used X300, used X41, a weird desktopy-mediacentery thing) when I moved in, I got a T410s after two years from the money I had saved when the battery in the X300 failed and sold the latter for 500€ (350 after replacement of said battery). Trips to my parents were usually paid directly by them, but they obviously weren’t strictly necessary either.
You can get a döner and a drink or two for ~8 € – surely not eating out, but not eating in either.
[0] I spent about 25 € there per week, which would give 120 €/month for strictly groceries and a further 30€ for extras (cheap pans, clothes, paper etc.).