I have never had a problem with this so I was surprised to see this was such a problem. Maybe it's just the tool being used to open the clip, I know the tool can make all the difference in making a job hard or easy.
I use linesman pliers, these have a wide tip (9/16" / 14 mm) so you can grab all 3 prongs on the clip and fully open it, then just slide it down the hose past the nipple (about an inch or so). Then pull the hose off by hand.
On reassembly, the clip should still be in the same place. I just go in with my left hand and push the hose back on, then fully open the clip with the piers and slide it back in position.
My pliers are Klein but I do not know the model number since the number has worn off the side. I got mine in 1989 and think I paid around $15. These have been one of my most used tools. Klein web site calls these 9" Side-Cutting Pliers. They have many variations of this tool, all with the same basic dimensions.
These appear to be about the same as what I have.
https://www.kleintools.com/catalog/high-leverage-side-cutters/9-inch-journeyman-pliers-side-cutting#
If you click the buy now button on the website it lists several retailers with the lowest price of $38.36.
All the measurements match what I have but the spec they give for the jaw width is with the pliers layers laying flat and measured across the widest point, the measurement I gave above would basically be with the pliers laying flat then measure the height. (They don't give this measurement)
I am sure you could find a similar tool that is cheaper, the important thing is probably having the same shape tool to get in there and having a tip wide enough to easily grab all three prongs.
I hope this helps.