I would agree with this for the most part, but to say there is no joy in our regeneration would be missing the mark somewhat.
Yes we carry our cross, yes we die to sin, yes we face trials a problems. But as believers we count it all as joy do we not?
I'm pretty sure this is why most of the world sees us as sorta looney

Gal 5:22
But the fruit of the Spirit is love,
joy, peace, patience, kindness, goodness, faithfulness,
Joy is even part of the evidence we are indeed bearing the fruit of the spirit. Count me as feeling pretty good, even in the midst of my trials!
Grace and Peace!