I see no value in translating Greek in ways that the Bible translators avoided. Translators who knew much more about Greek than you do translated it differently.

The antichrist won't appear until after the pre-trib Rapture of the church. That's pretty obvious:

(2 Thessalonians 2:1-3 NIV) Concerning the coming of our Lord Jesus Christ and our being gathered to him, we ask you, brothers, {2} not to become easily unsettled or alarmed by some prophecy, report or letter supposed to have come from us, saying that the day of the Lord has already come. {3} Don't let anyone deceive you in any way, for that day will not come until the rebellion occurs and the man of lawlessness is revealed, the man doomed to destruction.