Washing machines and fridges that beep at you.
And yes, keyless cars: they should never have happened. They've made cars more vulnerable to theft, not less.
Modern TVs seem to have artificial delays. Suppose you want channel 4: you press 4 on the remote, and you get channel 4 after several seconds. People who remember old TV's (press a button on TV itself, satisfying clunk confirms the change) often think the TV hasn't responded, so they press 4 again. Result? Channel 44.
Computers in general. They try to be so clever, they're really unpredictable now. You pick up your laptop because you want to use it, and it says...
Installing updates, this will take a few minutes.
Grrrrrr! And then you don't know what it will surprises it will throw at you after the updates.
At least the old, clunky computers of the 1980s and early 90s were predictable, you knew where you were with them. I liked Windows 98: I think all versions of Windows since then have been rubbish.
I also dislike the informal messages that Windows seems to have gone for, such as "Hmmm... we can't find this page".