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Wisteria roots are aggressive and fast growing and can cause damage to foundations.
I would advise you move the plant.

https://www.gardeningknowhow.com/ornamental/vines/wisteria/controlling-or-getting-rid-of-wisteria.htm
https://www.gardeningknowhow.com/ornamental/vines/wisteria/transplant-wisteria-vines.htm

The soil may have too much nitrogen. Try to offset it with some phosphorus, like bone meal, to help promote more lush blooms. This article should also help: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-blooming-problems.htm

You likely need to increase watering to the plant.
It has most likely dropped leaves to protect the roots from the heat and dry conditions.
Here is a link to refresh you on the care requirements.

https://www.gardeningknowhow.com/ornamental/vines/wisteria/growing-wisteria-proper-wisteria-vine-care.htm

Here is an article that you may find helpful: https://www.gardeningknowhow.com/ornamental/vines/wisteria/wisteria-blooming-problems.htm

Pruning will help maintainyour wisteria. This article should help: https://www.gardeningknowhow.com/ornamental/vines/wisteria/pruning-wisteria.htm

You can plant wisteria any time of the year in most locations if you are transplanting a container-grown plant, though early spring is usually the best time. If you are transplanting an established vine, then this must be done while it is dormant, usually in winter.

This article will help with its care: https://www.gardeningknowhow.com/ornamental/vines/wisteria/growing-wisteria-proper-wisteria-vine-care.htm