It makes no sense to me that this is your experience as an EV owner, but I guess the US really is miles behind in infra.
It depends heavily on where you live and whether or not you can use Tesla's charging network. In California with a Tesla, sure, generally not a problem. In Texas and can't use Tesla's chargers? Welcome to my world.
The UK is tiny. Very different situation than driving across Texas, much less traveling to other states in the US.
I frequently drive between Austin and Houston. There is one (one!) non-Tesla L3 charging station between those two major cities on the main highways. It has 6 charging spots (3 pedestals) and it's fairly typical for half of them to not be working. I had to move spots twice trying to get one to work last weekend and almost had to move a third time until I happened to try tap-to-pay instead of inserting my credit card. If that hadn't worked, I would have had to wait for others to finish charging before I could start.
Given the number of users at that station, I'm no longer willing to take my EV on holiday weekends because of the risk of having to wait for an hour+ to charge on the way.
Will it eventually get better? Yes, but it is not good enough yet for people in most of the U.S.