Thank yu for enclosing the image.
The hydrangea will be fine. Plenty of new, vigorous sprouts are starting from the base and will reach their normal height this year.
If it is a mophead hydrangea (Hydrangea macrophylla), it may not bloom this year. But it will next year, if not pruned so aggressively again.
See Pruning Hydrangeas -- https://www.finegardening.com/article/pruning-hydrangeas