The bottom line is that Loeffler is a Republican incumbent, and Collins isn’t likely to get us anything in the Senate that we wouldn’t already get with Loeffler. Your claim that Loeffler “will turn on Trump as soon as she is elected” is silly. For one thing, this is a special election for this seat, and it will be contested again in 2022. Secondly, I will take a track record over a prognostication any day of the week.
Sounds like you are supporting Collins since he has a record in the U.S. House going back to 2013 and "Senator" Loeffler goes back to January 6, 2020.
Let's look at that "track record"
There have been 62 votes since she has been in office.
15- of those votes were for judges (not a hard vote).
2- "not guilty" (She voted against Mitt)
40- were agreements to motions
3- were rejections of cloture motions.
1- was the passage of a joint resolution to direct the removal of United States Armed Forces from hostilities against the Islamic Republic of Iran that have not been authorized by Congress. (That one was AGAINST President Trump for killing Soleimani in Iraq)
1- was the passage of the USMCA (She really had to think that one through, huh?)