Specifically the ads hub or whatever they call the section that is supposed to help with ads reporting.
I've already built 2 replacements for it.
They were so sold on the hubspot promise they dedicated a significant amount of time and money to try to make the thing do what they expected, and then consulted with 3 software dev companies to build out what was needed to make it work.
Once they saw the $30,000 price, months of custom dev work, plus what is the enterprise level thing now? $7k or $8k per month - and this is shimming.. they paused finally.
Funny thing is the new canvas in google sheets did 99% of what was wanted, did it in 30 minutes, and it's $30.
Build a replacement for looker studio, exact same issues.
Although Cody might have done that with Graphed - I have not jumped in to test it yet.