Ive been on both sides and used most google ad products. For a solid 1.5 years we had to use Opera to function in DBM due to Angular memory leaks. I live in DFP now and have to reboot my machine after 3-4 hours in their interface using Chrome and Safari. Maybe they are just a really, really unfathomably big company that always see as users do across every team.

I'm not so sure. I've witnessed their adwords team plunder a startup marketing team's budget with false promises and bad advice.

Some extra detail (what's easy to share) could be very interesting.

Sorry, I've really tried to come up with anything it seems reasonable to share more than:

'Google's ostensible adword assistance team were no more than glorified inside sales and, over the protests of the rank and file, bamboozled management into throwing over a $1 million dollars of good money after bad which helped sink the company'