Keeping the three (or seven) annual feasts seems to stick in your craw. It is not a law, it is a suggestion of the Lord as the best way to understand his plan of salvation, to praise Him, and to celebrate Him.
We are to look at the suggestions of the lord and judge them as to law or schoolmasters through the law of love and whether it is part of the kingdom of the lord. Is keeping the feasts part of the love as we are told all law is or is it like fleshly circumcision? Cutting flesh is not preforming an act of love it is a teacher of the law and we are not obligated to the teaching commands. Are the feasts teachers or acts of love?
In Exodus 23:14-17, God says,
14 “Three times a year
you shall celebrate a feast to Me. 15
You shall keep the Feast of Unleavened Bread; for seven days you are to eat unleavened bread,
as I commanded you, at the appointed time in the month of Abib, for in that month you came out of Egypt. And no one is to appear before Me empty-handed. 16 Also
you shall keep the Feast of the Harvest
of the first fruits of your labors
from what you sow in the field; also the Feast of the Ingathering at the end of the year when you gather in
the fruit of your labors from the field. 17 Three times a year all your males
shall appear before the Lord God.
"You shall" and "as I commanded you" don't sound like "suggestions" to me. Rather, they sound like
laws which is appropriate as they are part of
the Law.