Oh, I’m definitely upset about ebikes with motors and batteries integrated in the frames, with no replacement parts available. Often you can’t even install used parts because the firmware needs to be flashed by a dealer for your specific bike.
I own an ebike now and I’ve built one in the past. The one I built had a powerful mid-drive motor and could easily have been reverted to a normal bike (I got hit by a car before I ever got to think about that) and the ebike I have now has a basic bafang hub motor with a bolt-on battery, all of which I could easily replace if they failed.
The motor controllers on both bikes are/were also able to be reflashed or replaced without going to a specific dealer.
There is no reason that companies could not design ebikes and their components to be repairable, replaceable, and reprogrammed by users except for profit, and it’s gross as hell.
On your other points: Carbon bike frames can be repaired, so even though they aren’t recyclable, they can still last a long time, so they’re not the worst. Electronic shifting feels a bit gimmicky to me, but all the mount points for the shifter and derailleur are standard and they can probably be swapped out for a standard cable shifter in the future without changing other parts on the bike.