I like that they exist, but I think there are way too many companies competing.
I would rather see the EU:
1. require that they cooperate on one app to use to rent them, and require that all scooters in any EU city work with that app
2. require the use of helmets
3. require designated parking areas (this could maybe be a city by city choice I guess)
I fully expect that if such rules were enforced, many of the companies would likely just choose to move their operation elsewhere. I'm fine with this, dumping scooters on the streets because there are no laws saying they can't is a vile approach to business.