Work with them, start ground work and gently work them up to a working routine. Saddling is fine, bridling is fine. I wouldn't ride until they're 3-4 years old, and even then only gently, slowly, and for short periods of time. The skeletal structure isn't fully fused until about 6 years old. I wouldn't start any serious riding until about 5, and even then, work them into it gently.
They are literally still babies at 2 years old, no matter what the breed, gender, or size. They're not even remotely sexually mature until about 5 or 6, so I wouldn't treat any 2 year old as a mature adult mount for a few more years.
Think of it not as a failure but as a success in how not to do it.
Don't look in a horses mouth for a gift.