Ask HN: Bluetooth Connectivity – A Step Back?

Why do new Bluetooth devices 5.0 LE? have poor connectivity? Purchased Bose QC 2 earbuds recently. Within few tries they failed to synchronize with each other and then failed to sync with 15 Pro Max. They were already paired with my phone. They worked like a charm at first try. New out of the box and issues within a day. As opposed to my Old Bose over the ears ~5 yr old - connect every single time without any issues.