Obviously because a petrol car will take the pretty much the same amount of time to fill a car whether it has a 10 gallon fuel tank or a 20 gallon fuel tank. When EVs were first introduced they couldn't travel more than 100 miles so obviously that lack of range (and there were hardly any chargers available ad none of them were rapid) was the main barrier to owning one. As time goes by that decreases but it still exists. As an EV owner, even though I only charge away from home on long journeys once a month maybe, it is something that has to be thought about and planned which never did with an ICE.
I know the term range anxiety might have been coined as a marketing trick but it stuck because it is real. It might not occur to a Tesla owner with access to the supercharger network but for most EV owners they will look at their route, see the best option and get there and realise there is a queue for the charger because it is the only 100Kw charger on that stretch of Motorway. It only needs a queue of 1 when there are only 2 chargers to turn a 20-30 min charge into an hour plus total stop and that is massively inconvenient when it means adding an additional 30% to the length of your 3 hour journey (which you possibly wouldn't have even stopped for at all in an ICE). I don't think the anxiety is from running out of charge though, it is from finding a charger in working order, that is quick enough and convenient enough to not drastically increase the length of time it takes you to do your journey. If you have young kids with you or a wife that says "told you we should have bought a petrol one" then multiply this "anxiety" by 10.
These issues will all go away over time. Not enough chargers will always be an issue when number of people wanting to charge exceeds the number of chargers even just by 1 but as soon as the capacity is there to meet the demand then it goes away and it just become part of the routine. We're not there yet though. We probably have the infrastructure for last year's EV numbers but there are more and more EVs on the roads every day so that demand isn't stagnant, it is growing. Infrastructure needs to expand quicker than demand for the anxiety to disappear.
On a long journey with an ICE you're still doing a stop to fill up earlier in the week a stop to top up before you go though, never mind a stop to get back, or after you're back if you don't have a massive tank. Even someone with a 500 mile tank has probably 3 visits a month to a fuel station, to do a 1000 miles, it adds up.
That's probably adding 45 mins on anyway, when you factor in driving to and from the petrol stations, filling up and paying etc. Over the course of the last two month, where I've drove 2500 miles the total time I've spent dealing with fuelling up is plugging it in at home maybe 15 times, taking about 10 seconds each, about a minute a month. Even adding a half-hour stop each month I'm still wasting less time fuelling, or it's comparable.
People just notice the EV time a bit more, as it's a physical wait sometimes, but most of this is often at services when they're grabbing a burger or whatever. It's largely not wasted time, a bit more like double use of time, but of course you get a bit less control over when you stop, if you have sub 200 mile range.
Planning ahead with EV's does work a lot better mind, no denying that, timing a stop to a faster charger, or a time when you would stop anyway for food etc. Using zap map, rather than relying on the car telling you what to do, but I suppose you need to be a bit more switched on than with ICE, for now at least. I can understand why some wouldn't like that mind.
They do need more 100kW plus chargers on the Motorway/ major long-distance roads mind, or even better 350kW, and they need to force faster charging capability on new cars, otherwise, they'll end up hogging chargers, blocking others etc. The need to be forcing new fuel stations, and supermarket refits etc into having rapid chargers as part of planning consent, same as new homes too, force them all to have off-street parking and chargers, or on street chargers.
Reliability isn't bad, not from what I've seen but I rarely use public chargers. I expect the problems are being complicated by different cars working in different ways, they need commonality, and forcing asian car manufacturers to move to CCS would be a start, and also retrofit CCS to older cars, or a workaround. Two competing connectors won't work, it's never going to be efficient, and one will win, so the sooner we switch to one only, the better. Maintenance of them is going to be a problem until construction solves it's labour problem, but that's not going to happen soon.