Sorry to hear you're having troubles.
What exact spine-unity runtime version (name of the unitypackage, also listed in Assets/Spine/version.txt or in the Package Manager) are you using?
cimmen 几十个皮肤的spine文件导出超过1个小时，是正常的吗？
Is it normal to export spine files of dozens of skins for more than 1 hour?
Given reasonable hardware, that's not normal, no. What are the metrics (see here) of your skeleton to be exported?
