I think that some people here are being rather unfair on Longford, the original poster.
Dyscalculia is a recognised learning deficiency, and not really just a case of working harder at the groundschool. Some people have a very genuine inability to handle calculations.
The first part of the solution may well be to find a learning styles specialist (unlikely to be a flying instructor) to help with finding strategies to deal with this problem.
The use of a calculator, and strictly learned rules by which things are written down and calculator use done in particular orders should help with most things such as weight and balance and performance. Creating tables or diagrams that can be used in the air to look up and solve particular navigational problems is a potential solution also. The best or worst of us (and I'm probably above average in maths, having an engineering PhD) use these to make life easier and safer.
The infamous "whizz-wheel" / CRP-1 / E6b / circular slide rule is disliked by many pilots for being an odd and unnatural way (to them) to do calculations - I'm guessing you've not dealt with it yet. I'm guessing, but because it does calculations in a completely different way to the normal arithmetic that you struggle with, *might* offer a solution. It is worth trying to learn it to see if it comes any easier.
It's also true as has been said that the microlight syllabus (and I think also the glider courses?) contains a lot less calculation than the light aeroplane syllabi. That might be something that you find much less painful, but at the same time provides just as much potential for fun flying.
So in summary:
- It's a problem that may be solveable, but try and get some specialist help
- Carefully picked strategies should see you right, simply working hard won't if you genuinely have dyscalculia
- Microlights or gliders offer much fun, probably cheaper, certainly less maths.
G