The suspension on my 2015 Nash 22H needed to be completely replaced. The equalizers were cracked, the shackle bolt holes were oval, the spring bushings were worn out, the bolts showed wear patterns...
I understand what the OP is going thru, and blaming him for the problems is standard procedure from those that don't have a clue.
What he didn't realize is that all travel trailers use the same junk below the frame. Those with no mechanical ability fail to see it as junk when it is right there in front of them.