Sure, the Republican Vote was split. Do you think that ALL of those voters who were split will magically back Ms. Handel? Realistically , it would not take much defection of Republican Voters to push Mr. Ossoff to victory in the next election. If this election truly is a referendum on Mr. Trump, his continued support of Ms. Handel and negative commentary on Mr. Ossoff could push the vote away from Ms. Handel.
Let's also agree that if Mr. Ossoff was a Republican and all of the things that you're considering above were true, you'd be declaring this a great victory.
Give it up.