Have you had someone smash your hamstrings?
This can have a big impact.

Some hamstring issues can originate with the glutes
Pro Episode # 45 – Pro user Request Friday: The Dread Piriformis Syndrome (Like the Dread Pirate Roberts…but Different)
Athlete’s ROM: Full Posterior Chain- Are You Dysnormal?

You can break up the time you spend on mobility into shorter better quality time spent.
Are you seeing improvements with what you are doing?