Breaking bad news by text is fast for you and slow for them.

Delivering it that way solves your problem and creates theirs. You get it over with in twenty seconds, and they are left holding something heavy with nobody there, no way to ask the obvious question, and a message they will reread. The speed you gained is exactly the support they lost.

For anything that will land hard, call, or say it in person if you can get there. If a text is genuinely the only option, keep it short and say you are available right now. And if you are on the receiving end of one, you are allowed to ask for a call before you respond.