I noticed you read and cited a verse from Romans chapter 14, but did you bother to keep reading in the chapter?
Read verse 6:
Rom 14:6 “He that regardeth the day, regardeth it unto the Lord; and he that regardeth not the day, to the Lord he doth not regard it. He that eateth, eateth to the Lord, for he giveth God thanks; and he that eateth not, to the Lord he eateth not, and giveth God thanks.”
If you regard a specific day, it must be regarded to the lord. It must be a day that honors God, and it must be a complete day…all 24 hours. The verse does not say anything about half a day, or 14 hours, or just 2-3 hours at church. It says a day, a full day. And according to the bible “the evening and the morning was the first day”, therefore a day consists of both evenings (nights) and mornings (days).
The only day that is holy unto the LORD is “the sabbath of the LORD thy God”. The only day that honors Him that “made heaven and earth and all that in them is” is the specific day that God set aside as a memorial of His creation.
The sabbath was made for all mankind (Mark 2:27), not just one specific group of people.
Also you spoke of the ‘bondage’ issue. How can a day of rest be considered bondage? How can you be under bondage and be taking a break, a vacation, a rest from work?
Do people who worship God on Sunday commit the entire day to God? Do they have nothing to do with worldly matters for an entire 24 hour span? I’d bet not. So many professed Christians go to church on Sunday morning, then go and conduct worldly business afterwards…Eat at a restaurant, wash their car, mow their lawns, go to movies, etc. This would be a desecration of a day they keep holy unto the LORD in the first place. Sabbath keepers keep the sabbath holy unto the LORD in its entirety. From sundown Friday to sundown Saturday we do only those things that God would have us do, and we don’t have dealings with worldly matters unless it were a life and death matter and absolutely necessary.
If you are going to quote scripture and use it to validate your position on a topic, then please use the entire context of that scripture. Anyone can find a verse to fit their own agenda, but for it to be biblical truth, it must be in harmony with the rest of the bible…Sunday worship is not in harmony with the law of God, a law by which we shall be judged (James 2:12).
God bless you for reading His word. Now read it in its entirety.