Doesn't every stage have it's amazing bits and horrors?
Newborn stage is horrendous with sleep deprivation, worrying if you are doing it all wrong and for some lucky sods, reflux. But then they smile at you and you melt. And those cuddles are just lovely.
They learn to walk and it's wondrous. Then they learn to climb and start shoving everything in their mouth or places stuff shouldn't go and your house starts to look less like a home than a prison camp with everything locked up.
They go to nursery and you miss them but they start making little friends and come home with lovely pictures of stuff they have done. But at the same time you have to carry 58 clean pairs of pants every time you leave the house because they keep peeing everywhere.
They go to school and it's worse as they are now gone all day five days a week. And they now have to navigate friendship groups and drama, even at 5 years old. You have to deal with their disappointment at not being invited to a friends for tea as someone else has gone. And as a parent you have to deal with parent dynamics in the playground.
Once they get to their tweens/high school age, the fun really starts. They start becoming so aware of how they look, what everyone owns and you hear 'but everyone else does' at least once a week. This age is traumatic for everyone. Their hormones are mental and this in turn makes them unreasonable in the extreme. At this stage I recommend a prescription for valium.
Teens is hard. Really hard. Hormones, friendship groups, money, phones, exams - everything is drama. All of it. And they need you more than ever I think.
And then they tell you they are going to uni and the day you help them pack up and move out to go to uni 200 miles away is one of the hardest things you'll ever do. But if you have got all that other shit right over the years then you'll have done a good job, they can stand on their own two feet and they'll come home again full of tales of new friendships, parties and being out in the world.
The biggest reward for not killing your teenagers is grandchildren.