GPU Performance issues in Illustrator 29 on macOS

Recently I'm witnessing more and more bugs/glitches that are resolved by switching from GPU preview to CPU preview. I wasn't able to track the exact situations that generates them but all of a sudden I see big pink areas that change when moving objects (not in the actual graphics, just in the "preview"), much greater "alignment" issues (this always happened but only when zooming a lot, and only on certain projects),  “approximation” of curves (not sure how to call them). and gradient pixelations.
All these stuff had a 500% increase since I’m using Ai 2025, especially the latest releases. 
I can’t update further, anyway (nor downgrade at this point), since I’m using a 2015 Macbook Pro Intel Core i7 quad-core with a AMD Radeon R9 M370X GPU and 16GB RAM.
I know it’s a pretty outdated machine but it always run perfect so far and never had such issues before!
I am now on Ai 29.0.