3DPrinting

To start, your z offset is too high, your nozzle isnt close enough to the bed. Your lines should not have gaps like that, gapping in your lines means the nozzle isnt close enough to the bed to "squish" the plastic outwards and join with the adjacent line. Im gonna go out on a limb and guess this print peels off the ned very easily, and as you pull it up and off it sprt of "splinters" a bit, parts of it "fall apart" right?

If you get your z offset right, the print should come off as 1 solid piece without gapping.

Quick question:

If you run it the same time, are the failings in the exact same spots, or different spots?

Exact same spots

Bed issues, or physical issues perhaps with the wire harness to your heater catching or stretching, causing hiccups. Watch as it prints the problem areas for physical issues like it bumping stuff, or scraping on things, the wire harness, etc.

Almost same spots but not exact same

Flow issues, lower print speed 20%, see if it improves a bunch. Your nozzle is backing up and then surging causing inconsistent pressure on long runs.

Different spots

Check your z offset and watch your spool as it spins, if your spool is catching everytime it turns, it'll inflict random jerks on your nozzle. Also check tightness on your movement system, it might be loose and getting perked a bunch by pulling on the spool as it works through the filament.