Since the 2021 updates, the only function that is still working is crashing down. It laggs like never before and update after update, it keeps getting worse. You update everything else, you make sure with them everything is okay and it still runs like crap. This is seriously disappointing.
Sorry to hear about your experience. Would you mind sharing more information about your concern? Do you see the crashes/lag while working on a specific file or performing a specific task? Please share version of OS & Illustrator as well. This information would help us assist you accordingly.