The point is is that you are stuck on yourself and you don't realize it. You're to quick to discard God and faith. Here is an example: that you think that you are greater than God and put yourself on the throne as the almighty. Your faith is in yourself and you expect to be worshipped. You say that you built your whole life aroind your kids. Be grateful for what you gave to them and expect nothing in return. But you are expecting something in return. Look for the pleasure and reward of giving because you can. Give thanks for your capabilities to give of yourself. Isn"t that what Christmas is all about. God loves you and gave someone very precious to Him for you. He said Me for you. Love me. His adult children don't want anything to do with Him. Sound familiar? But He loves His children and gives of Himself. God loves you. Take it! Love Him back! You will witness great change.
I hope you do. Then you will see "the point" of it all. I truly hope you do.
To add more: I don't know you but I really care about you. I love you as a friend and want you to be filled with joy and satisfaction. Thanks for sharing your disappointments. I'd love to hear from you. Victor