Quitting is easy. Certainly easier than persisting, learning and understanding that the postal system isn't actually set up for eggs, that all eggs are only potential, that what you do affects outcome, and that even professional hatcheries lose 1500-2000 egg hatches.
Learning your own bator, your own conditions, learning NOT to buy a ton of expensive eggs while you're getting a handle on the whole how to thing, learning to put them in, turn them and leave them alone for 18 days is all not simple.
Shipped eggs are always a risk, no matter what care a shipper pays in packaging. You will never know what heat, cold, pressure that an egg comes under in shipment.
You want some guarantee? There isn't one. If I REALLY want a shot at viable eggs not my own - I drive to get them.
Life isn't an equation. Do A and B and C in perfect order and bingo- life.
Hatching is a challenge each and every time you do it, no matter where the eggs come from, no matter how much or how little you spent on the incubator. Some produce more reliable results than others.
With a lot of research there are probably eggs of the breeds you want, in your state or nearby states. Still no guarantees, but better odds. Or find chicks in the breeds you want. If you drive there usually aren't quantity problems when you pick up.
Incubation is an experience based hope of an outcome. Sometimes that's joy and wonder and sometimes it's disappointment. I lost my first shipment of two types of eggs, all but one. And some of the next batch of shipped eggs. And I'll lose some of this next batch - probably.
And some in the next batch. Because shipping is a gamble, each and every time.
But I am getting some GREAT stock out of it over time. As my skills get better, as I get used to my homemade incubator, I get better results more of the time.
Had I quit at the first botched hatches, a lot of the feets on the ground here, wouldn't be here now.
If you can't take the gamble, or support the costs, then yes, quit. Or order fewer shipped eggs at once, rather than drop $$$ on tons. Practice on cheap eggs or free eggs. Then try again.
Quitters, by definition, cannot get better at compensating for shipped eggs.