This is why every one or most do anyway machined brass or stainless hose ends.
Stamped brass plated metal is what is on most hoses now. The washers are a problem too. We carry a pack or two and one box of good ones I found somewhere.
The metal bends from minor loads or even tightening behind the coupling and can leak from there or the lip potion that seals against the washer can be bent by screwing and unscrewing with a little sideways pressure. Little bend will leak a geyser. Several or many of us have had hoses blow off the connectors, when connected to a high pressure faucet or overnight, and the hose just sort of squeezes out of the fittings or the hose swells and blows.
I have a Compartment full of white hoses used once or twice that leak, I guess if I ever find some good ends that connect right, i can sell them for a small fortune total. Those thin hoses also let light in and breed all kinds of algae and boogers, in the sun. A good lined hose with machined ends will generally end the ills. Solid brass and especially stainless will loosen and tighten smoothly. The plated stuff only the first time or two or three. The plating is very thin and the tightening and loosening get gritty, just like the cheap zinc plated stuff water fittings, from the big box stores.