It is March 2022 and just update to Monterey version 12.2.1, MAC still has the same problem on mouse response and bluetooth connection. Does Apple really tried to solve this?

After 5 hours/2 days working with Apple tech through phone, we did everything mentioned above and even more at least twice, still NOTHING WORKS. We had to send iMAC back to a local store and see if they have a better solution and voila~ after spend $267 for changing the wireless card, bluetooth/airdrop/mouse finally all function well. It seems that the Monterey system has bugs with the wireless/bluetooth card. It seems when updating OS, it's time for the Mac store to get profit from old customers.