Look at the top and bottom edge of your belts.
If you can see fiber its excessive wear, especially given the time its been working.
Mine already shows signs within approx 2 weeks of use.
Τo my knowledge this type of wear and coupled with the fact that the belts , at least on MY machine, are not centered on their rollers/idlers, indicates a not squared Gantry.
Not squared gantry on any machine like a Voron means trouble, but its solvable as you can adjust any and all bolts, parts, extrusions, chassis etc of the printer, but on H2D it indicates a serious production overlook , IF indeed the gantry is not leveled/squared properly.
Refer to the following photos for examples and check your belts and rollers.
This happens because the belt not being centered is rubbing against the lip of the roller, wearing it out and most probably affecting already the printer’s performance. COULD also be related to poor quality issues that many users report.