I actually don't like "Signal" either, because it's such a common word that it makes it hard to search for it online. "Telegram" is marginally better, since original telegrams are not very relevant today.

But yeah Element is arguably even worse, it's a super common noun and it doesn't seem to have anything to do with communication.

But in the end these naming discussions are always going to end up as bikeshedding. If the tech is good it'll probably manage to be successful despite its mediocre name.