Euron teleported from Dragonstone to King's Landing in the last episode, do you see anybody complaining about that? No? Right, because that's not what people are taking issue with. It's a show. There isn't enough screentime to have characters on their own while traveling, nor is there really much you can do with characters sailing for days or weeks on end going from A to B.
The only time, that I recall at least, where travel time was something people took issue with was Jon and friends being stranded up north last season and the speed of their rescue. However, this isn't related t