The very first Prius had a gas engine which was not very different from ones Toyota had been making for many, many years. They knew how to build them and had long since made them reliable. The Prius then, after the first generation, stabilized and was produced for years. All the issues which came up were addressed and polished/refactored to make subsequent builds more reliable. Toyota really knows how to make Priuses now.
All the electric cars on the US market, with the exception of the Leaf and the Teslas, are new models. The first generation cars were all completely redone. There's no polishing of an existing good design, here. EVs are inherently much more reliable than ICE cars, but there are many trivial, stupid mistakes to find in any design, and all the good EVs are really divergent from the well-known patterns. A couple of things need to happen before things get reliable -- we need to go through this big phase of experimentation, and we need to have models continue with only minor changes for years. It's just a bad time and will be for years. But it's not the motors which are at fault here, or the power controllers, etc. It's the deeply buried thermistors, sensors, wiring harness changes, and frankly the fear and lack of education on the part of body shops for example -- if you have a fender-bender, you're likely to find the body shop won't touch your EV.
I was talking to a Niro EV owner who was not happy with the car because he was having issues with a bunch of senors. Nothing at all to do with the fact that it was an EV -- everything to do with the explosion of change in cars going on right now and the fact that all those gizmos are new.
I don't think all that is a reason not to get an EV. But it's a helluva good argument to get as cheap a used EV as you can, and let the wealthier folks, car leasers, and the fleet buyers ride this rough patch out for you.
I've owned a cheap EV for about 5 years now and have never had a lick of trouble with the EV part of it -- I had to fix the struts, a seat, and a dome light. I love the thing, and my next car will be an EV too. But I am trying to find a simple one, cheap.