For a private pilot, the time to solo or to gaining the PPL is simply a matter of cost and available spare time. For a professional pilot, or those seeking to employ them, such things are, as you have guessed, significant.
I would expect, subject to adequate continuity and instruction, a reasonably capable student to solo and complete the PPL within 10% of the normally allocated hours. If your continuity was extremely poor, or you have objective evidence that your instructor was not up to scratch, you may be able to justify taking around 50% longer than the norm. However, you are right to be concerned.
An employer is unlikely to take too much notice of your PPL record, but if this record was continued in your CPL training, you would be highly unlikely to gain employment. In fact, I would expect any decent CPL instructor to advise you to stop wasting your money long before it got to that point! The fact is that ambition and desire do not substitute for aptitude, which is one of the reasons that airlines are carrying out (or having it done on their behalf by FTOs) far more pre-selection than they used to. To put it in perspective, the RAF demands that its pilots solo in about 11 hours (in a complex, fast TP), and by 45 hours (the norm for a PPL) have completed initial IF training, and other fairly advanced techniques. The RAF's requirements do not read across to the airlines, but the abilities required to succeed are not dissimilar. Despite what you may be told by some, determination will not carry you through if the ability simply isn't there.
So, what do you do now? I suggest you visit another school - preferably one which has a good reputation here on Pprune - and get yourself assessed by one of their more experienced instructors. Explain what has happened so far, and get them to give you an honest, no-punches-pulled assessment of your chances of completing training within a reasonable time and budget.
Good luck!
Scroggs