100% agree. Not sustainable. Which thank god for overtime am I right. Luckily for me, I've always prioritized insuring my car and my health over everything else. Because then at least if anything happens I can get hospital food and my car will be fixed. With entertainment, we are lucky to live in a world where the subscription model is now becoming the normie GamePass. I'm pretty introverted as it is and really do not enjoy going out to drink at bars or going out at all really. If I drink it's with 1 or 2 close friends with a cheap bottle of 1880 we can buy at a merchant for half the price. As for saving and investments, I firmly believe in spending what you have to construct the life you want. You can do way more and build more with your money as a young man than what you can do with it sitting in a bank account gaining interest that will only be of substantial 30 - 40 years down the line.
If you cant afford to save - don't. Rather factor the money you would be saving into some sort of asset that will allow you to grow your wealth. Put it into a car payment or something. The previous car I sold for R60k, took R40k put it down on a deposit on my next car, kept R20k to supplement payments for the months I'm short on and for services - now I have a car worth R130k which is insured for anything - which in my view means I jumped from a wealth of R60k to R130k. If I need money, that car is my fall back essentially. Assets should be your savings, not a bank account.