Furniture repair. Is near ways to fix wilting couches?

It looks great but big people enjoy plunked down with out grace and its sitting low.

Notes:
I already tried those boards you unfold and set below the cushions. They worked like three days.

I don't expect it's worth spending hundreds to have it professionally fixed.

Buying a clean one is a waste until these brats move past its sell-by date on their own!
Should I trademark my clean travertine tile past...
Answers:    If the couch has springs you can hold them tightened. I don't know if the price is worth it to you. You can also use regular wood instead of the trifold boards. Just attached the wood to the base, cover it next to batting and bits and pieces and put the cushions on top.
Teenage furniture & bedding websites?
If the cushions are able to be removed receive sturdy plywood and put that under them, it works really very well. We have leather and teh cushions do not come stale and my sweet children jumped on them and we hold that problem. I dont know how to fix it since the cushions arent removeable! Good luck!