Welcome!!
My wife and I are still in, with no intentions of committing "suicide" at the moment.
My Scriptural reasonings given to one like-minded Witness relative and a very good Catholic friend were these;
2 Thess. 2:11 - God is allowing the corruptions within the Christian congregations worldwide, whoever & wherever they are! (Rev. ch 2 & 3)
1 Peter 4:17 - God's judgement through Christ will begin with those who present themselves as Christians, whoever & wherever they are!
Ezekiel 9:4 - The sighing & groaning would be done by those within 'Jerusalem', whoever & wherever is represented here!
Matthew 24:13 - Christ said that endurance would be needed. That indicates maintaining integrity, in spite of what is going on around us!
The Bible gives numerous warnings about false teachers arising within the Christian congregations, whoever & wherever they were! Absolutely true, isn't it?