An important factor in the decision to bring a claim is always the ability of the defendant to pay. If the defendant is worthless and uninsured, you need to consider the wisdom of spending significant sums on legal action. It appears that the solicitors you have consulted see no justification for investing their time and money.
NB if you win, and have lawyers acting on a no win no fee basis, you would be obliged to pay a fee, with an added success fee. That is even if you cannot collect your winnings.