It is not easy to say 'oh anyone on benefits is having a totally shit time' OR 'everyone on benefits has it easy'.
There are different types of benefit for a start.
DLA/PIP are not means tested, out of work benefits - so someone who IS out of work living in council accomodation and is on the highest rates of DLA or PIP could very well be struggling to make ends meet.
Someone who is as I am, self employed, on DLA and has neither rent nor mortgage to pay, could be doing much better (I am just about making ends meet but the end of the month does come along a little later than the end of the money!).
Someone who is employed, has no rent nor mortgage, earns a bucket load and gets DLA could be rolling in it.
The real difficulties come with the out of work benefits - or when benefits stop or change over.
So when you start out on ESA you will go without for a week or two before you get your first payment. If you get a sanction or its stopped and you appeal you'll go without for potentially weeks to months.
Theres often a big gap between applying for benefits and recieving them, so if you move into rented accomodation it could be six weeks before your rent is paid - miss a trip to the job centre because you had a hospital appointment and you could do without a fortnights or even a months money and immediately you are into borrowing or starving territory.
Then theres the even less obvious stuff..
For example my house does not meet my needs as a wheelchair user - I am on the list for a bathroom conversion into a wet room and a stair lift.
These things are well out of my price range as although self employed my earning capacity is seriously reduced due to my disabilities (however I am NOT willing to claim out of work benefits as thats a merry go round my mental health cannot handle!).
If I were a council tenant, the chances are I would have either been offered a property that suited my needs better or the adaptations would have been done for me - because I am a homeowner and cannot move (selling would not release enough equity to buy a more suitable property without moving sufficiently far out of the area that id lose my support network!) I am bottom of the list for help there.
At some point I will not be able to get upstairs in my own home - so I won't be able to shower, or use my office and I'll need to sleep downstairs.
So, there are a lot of hidden things going on that may not be immediately obvious on hearing 'so and so is on benefits and gets x amount'.