Define easier

In terms of making the danger dot go, guns are miles easier to initially fire. But easy only in that sense, that pulling a trigger takes less force to achieve.

Bows are definitely harder to pull.

However, even a simple firearm isn’t as intuitive as a bow to make ready to shoot.

A gun, even the simplest ones, take more steps to go from paperweight to boom stick. A bow, you can just look at and tell there’s essentially three steps: put pointy part away from you, other end on string; pull string; let go.

A gun, you have to determine what size bullet and how much propellant, load a bullet and propellant, close the gun or otherwise ensure that the bullet comes out the danger end; then engage the trigger. And even that assumes the bullet and powder don’t need anything like a percussion cap, a flint or whatever.

If it’s a more advanced firearm, you’ll be dealing with some kind of safety mechanism, loading a magazine or revolver with the correct rounds, and how to open whatever mechanism allows you to load the rounds.

So, guns take more non intuitive thinking to make work, and are thus harder.

I’d say they’re roughly equally hard to shoot well, but that guns are slightly easier to shoot and hit something. Both take a lot of practice to keep tight groupings of the animation ammunition in the target. But you can kinda trust the speed of a bullet to hit what you’re generally pointing at, at close range. An arrow, it tales a little more effort to figure out how to do that. It isn’t a huge gap, but it is there.

It’s different learning curves, basically.

Type of device does matter some; an old school long bow is going to be a little easier for a total noob to put arrows into a target with than a fancy modern bow. And you definitely have a different set of body mechanics between long guns and handguns, as well as between rifles and shotguns. There’s nuances between revolvers and “semi auto” in handguns, bolt action vs semiautomatic in rifles and shotguns, etc.

But, on average, if I was wanting to get someone to the point they could have a decent chance of hunting something the size of a deer, I’m going to put a rifle in their hands. They’ll, with instruction, be able to get clean kills faster than with a bow. Even with iron sights, I’ve seen kids keep sub six inch groups after a few days of practice with appropriately sized rifles, at hunting ranges. An adult should be able to be ready to roll at least that fast