oh dear, I thought that was common only in my own marketing-in-tech career! My solution was to move away from the agency and to the agency's vendors, instead. Worked so far, a decade on!
I work on sales/customer facing side of a non-tech industry, but my experience has been different than root comment. My industry is engineer/finance driven, with sales as more of an afterthought or necessary evil. I try to stay tied in with the development/production side as much as possible for sales, but the mismanagement and culture rot on the development/production side has me looking for a new job as it spreads through the company. It’s tough seeing top performers leave/forced out and petty politics and mismanagement take over. It makes my job much harder. The rot has eventually trickled down to other departments, so I think it’s time to make an exit.