Respec for guardian rank?

is there a way to respect my guardian rank?

No. The closest you can get is either turning the GR system as a whole on/off for a particular character, or just enabling/disabling the specific perks you’ve unlocked by spending points (again, applies to each character individually.)

So actually, you can reset it, but you have to delete your save data completely from the xbox and the cloud. Fresh start here i come

Seems a bit draconian - not so much a reset as scorched earth. But if that’s what you want to do, go ahead.

There should be option to turn off only % bonus and keep the perks active. Right now it’s far from perfect.