Why is my website so slow?

Oversized images are the commonest and cheapest to fix. Then bloated themes and page builders loading everything everywhere, then plugin pile-ups where three tools each load their own copy of the same library, then hosting chosen on price alone. Occasionally it is something real like an unindexed database, which is where a developer earns the fee.

Speed is a ranking factor and a conversion factor: visitors on phones abandon slow pages before they see what you sell, and Google measures exactly that. A slow site is quietly expensive every single day.

Measure first, fix causes, measure again, and show you both numbers. Most sites can be transformed without a rebuild; when the theme itself is the anchor, I will say so and price the honest option. Details at WordPress repairs.