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I would cut them to the ground and if you don't get any new growth by mid June, just replace them. I find butterfly bushes to be short lived. They look good for a couple of years, but after that they seem to decline in the colder zones.

https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/how-to-revive-butterfly-bush.htm

https://www.gardeningknowhow.com/ornamental/shrubs/butterfly-bush/butterfly-bush-pruning-how-to-prune-a-butterfly-bush.htm

Try pruning your spirea to perk it up. It looks like it suffered winter injury in the past. For the hydrangea, if you do not want to grow another one, sever the rhizome that is connecting the two (plunge your shovel in the dirt between the two till you see the connecting roots severed). Then you can cut it back to the ground and repeat if it continues to come up. Or after disconnecting it you can use a nonselective herbicide to kill it. Always read and follow label instructions.

https://www.gardeningknowhow.com/ornamental/shrubs/spirea/pruning-spirea-shrubs.htm

It depends on how long the roots were exposed to air. This article gives tips on how to proceed.

https://www.gardeningknowhow.com/plant-problems/environmental/dealing-with-uprooted-plants.htm

Unfortunately, this might be due to soils that do not have a chance to dry out between watering. This should dry down to about 3 inches between waterings. Fungicides may be necessary. This article will help:

https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm

https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/testing-moisture-in-plants.htm

https://www.gardeningknowhow.com/ornamental/shrubs/spirea/growing-spirea-shrubs.htm

That is Spirea:

https://www.gardeningknowhow.com/ornamental/shrubs/spirea/growing-spirea-shrubs.htm