The print in the image is a classic case of leaning. It starts out ever so slightly but increases in “momentum”. This is not layer shifting, this problem got nicknamed “Leaning”.
Signs of leaning prints:
Usually a very slight but constant or proportionally increasing deviation along one axis. In contrast: a layer shift is a sudden singular(ish) occurrence at a much bigger scale.
Explanation:
Prints that are leaning to one side are usually caused by mechanical issues.
How to fix:
Slipping pulleys or gears or belts can cause the print to slightly shift and start leaning. Tighten pulleys/gears/belts to stop this happening.
Friction along the axis might cause it to lose steps. Just a few steps here and there, enough to make it lean. Clean and lubricate the axis so there’s no friction.
A misaligned printer frame or bed will result in a leaning print as well, check everything is as straight as possible.