I hope it won't come across as obvious or patronizing...not intended...just trying to be forthright and to actually help to give you impetus for a more productive remediation:

Your mask is wrong, or its fit is wrong. Only those two factors can be at play here. Note that this assumes you're also not getting the wrong therapy or many leaks, but the latter still comes down to those two factors, form and fit.

What makes it clear for me is that you have taken reasonable measures, common fixes, to improve the fit of the mask you have been using, and it still leaves you with pressure marks (have such forceful pressures not resulted in pressure sores by now...no suppurating skin lesions or discolouration?)

If a reduced tension on straps results in disturbing leaks, the kind that might keep you from falling asleep or that awaken you, then it's too light, or the mask design is not suitable for your features. If the correct tension results in no leaks, which is always good, but leaves you with sore areas and pressure indentations, then the tension is better, maybe even 'correct' for that mask as it conforms to your features. But the pressure is making the experience uncomfortable and unsettling. So, the upshot is that you have the wrong mask, in all probability. You must try several others, including sizes of each of them if they come in sizes.