I don't think it's miserable at all. We have enough money for everything we need and most of the things we want. I think we have a good lifestyle.
I earn 13k and don't claim any benefits (by choice). I pay 1k a year in taxes and national insurance, I pay 3k in childcare costs, £2,500 a year for bills, £2,500 a year for food. I don't have a car, we cycle everywhere, or catch a train, bus or plane when we go away. So that leaves us 4k a year for fun. Our mortgage is paid off. We have no debts of any kind. We have some savings.
I don't buy many clothes, I spend less than £100 a year on my clothes (I still have lots of clothes) and about £300 a year on clothes for DD; we go on holiday every year; we eat well; DD goes to various different clubs (all of them are cheap or free); we go to the theatre and cinema every month; a few times a year we have a big day trip or weekend away; we both have lots of possessions - a combination of stuff bought new, charity and car boot finds. I don't think we go without anything much. We don't feel poor at all.
Soon I won't have the childcare bill so we'll be a lot better off and I'll be saving up for a big long haul trip.
When I hear of people earning 70 - 100k and not having any money to do stuff I just assume they are either not great with money or they are choosing to live somewhere very expensive.