The dual boot situation kinda implies the need for high maintenance and issues. The most stable and carefree system I’ve experienced so far are single OS machines.
Popular does not mean better.
Better does not mean stable.
Stable does not mean simple.
Simple does not mean easy.
It does not matter what distribution or OS you run. experiment, try everything, make sure you have a solid backup strategy and learn what you want, need and the most important: What are you able to cope when things fail, and they will fail.
If you do try Manjaro again, ask questions on how to approach a problem you face on the forum using these tips.