Maine has RCV for a reason.
One of the reasons was to try to get rid of her...but it didn’t work...the other (bigger) reason was to prevent someone like LePage from getting elected governor again on a plurality.
She didn’t win because of rank choice voting.
Her democrat opponents each election cycle are so bad, Collins looks good by comparison, which she is NOT.
The only office holder who won because of rank choice voting in Maine was (retiring) Congressman Jared Golden, in 2018, even though the GOP incumbent received 2,200 more votes.