I don't know who needs to hear this but you can't reliably use the average position metric in Google Search Console unless you are looking at a specific keyword.
Looking at a site overall and seeing average position declining doesn't actually mean you have a problem.
You might be getting new low rankings that are on high volume queries. That would make it look like you were doing worse when, it fact, you might be doing better overall.
@ipullrank Oh don't get me started about how you rank for appearing in an image pack.
Every now and again I have a client who suddenly gets a massive amount of impressions for 'reverse uno card'.
Rank skyrockets and CTR plummets.
@johnmu @ipullrank Not weighted average position. No, no, no, no. That would just be another thing I'd have to explain.
Much of this isn't a problem with the metric but with people's lack of understanding of data analysis.
Outside of that, more clarity on what is included as position/rank would help. Image carousel? People also ask?
Biggest ask would be to create filters for those things. Remember when you briefly showed featured snippets?
AJ Kohn
MyCool King
John Mueller