First layer looks perfect on one side and crushed on the other

If the mesh is genuinely being applied, I would check X-gantry/tramming next. A tilted gantry can make the centre look convincing while the extremes are wrong. Also worth confirming the mesh was made at printing temperature.

A quick diagnostic is a five-square first-layer test. If the error follows left-to-right consistently, inspect gantry/tramming. If it moves around after a fresh mesh, look at bed movement or probe repeatability.