These issues might affect even new hires joining with the best of intentions.
I'm relatively new myself (1.5 yrs in) and we're in a growth phase, but the organization lacks structure for communication to flow efficiently. It's a problem we are actively working to fix via restructuring. That being said, when a candidate resume is received and there is a history of job-hopping, we will generally pass on that resume.
I've definitely heard companies saying this when it wasn't the case, "industry standard" means different things to different people I guess, and also depends what country you're hiring from.
When the market rate salary increases 5-10% a year, year over year, and you're giving 2-3% raises, it's no surprise people leave for a 30% range after a few years.