Just leave. Adios, MotherRucker
I agree. They just need to walk away.
Looking at the membership statistics it looks like it peaked in 1970 at 10,671,774.
http://www.gcah.org/history/united-methodist-membership-statistics
In 2010 it had dropped down to 7,679,850.
According to this UMC website the current membership number as of 2020 is 6,268,310
http://www.umdata.org/UMFactsHome.aspx
According to this UMC News website they are expecting their numbers to drop below six million by 2025.
https://www.umnews.org/en/news/us-dips-below-majority-of-membership
As long as the UMC continues to liberalize in all the wrongs I expect their membership number to drop.