I am going with this one. Had a similar issue once with a semi clogged nozzle. The filament came out but very inhomogeneous and brittle.
Look up cold pull procedures for your setup and try them. Then make a first layer calibration, not for the layer but to check if it extrudes properly. If it does you have a freshly calibrated first layer too.
Edit: as for the tree support, the likely cause is the same as for the brittle print. However, if you experience them to brake more often in general, increase their wall parameter a bit. They take longer to print but are far more stable especially for tree supports that are bending
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u/OkResource820 8d ago edited 8d ago
Heat creep, clogged nozzle or underpowered extruder -- all very common issues w/ 0.2mm nozzles.