And I don't really want any of that. I want just send textual message to group of people for free. Maybe add an image, but that is it. I don't really care about anything extra.

But even that Telegram does better, because you can edit messages you've sent to correct typos, you can pin them in channels, and there are extra nice things which might come in handy ( when do you want to meet? A pinned poll and it's easy).