That's right...he fulfilled all the Law...not just some of it...he satisfied all the requirements God commanded..... .....but if you believe Jesus fulfilled the law...then why put the bondage of keeping rituals, times dates and ordinaces etc. on the shoulders of people when He took those on Himself.....it brings an individual back under bondage to all the law which Jesus lifted from Him.
The Almighty sent Messiah into the world to give us opportunity of life everlasting - not so we might sin without regard to the consequences. Sinning means ignoring His commandments. Confessing ones sins, regularly and publicly, is one thing the Catholic Church got right, IMO.
Why do you find it so burdensome to follow His commandments? You obliviously celebrate both Christmas and Easter. Why not instead celebrate the actual days of true miracles, now that you know, instead of continued observance of the pagan worship days of old?