How much is the appropriate amount for living expenses for international students in the UK? 😭

I'm based in Manchester, and currently, my living expenses are £300 per month. Since my rent includes bills, and I'm close to Manchester University, I can save on daily utilities and transportation. Plus, I'm pretty thrifty—I cook my own meals and don't go out much. I typically replace household items every 2-3 months, and I only buy makeup, decorations, and clothes if I really like them—I rarely splurge impulsively. But why on earth is £300 still not enough? I see others managing just fine with £200 a month! What's going on?! How much does everyone else spend per month? 🤯🤯🤯