Does taking a long time to solo mean that I'll take a long time for training in general?
Yes, that much time pre-solo is a huge red flag.

If you have 80 flight hours logged and no solo, unless there is some unusual extenuating factor (e.g. those 80 hours were spread over many years), something is seriously wrong. Either:


You do not have the right aptitude for flying
Your instructor is incompetent, or
Your instructor is deliberately milking you.


If the instructor hasn't already had a frank discussion with you about your progress and prospects by this point, that would indicate #2 or #3.