I've more or less given up on Signal and recently moved to Telegram. I'll still use it for actually private communications, but for 90% of my chats, all I need is "good enough" security which both iMessage and Telegram cover with a much better UX than Signal.
I can't believe in 2021 they still don't have a native Mac app nor proper chat backups, and the recent announcement of their bullshit crypto integration clearly shows where their priorities are.
Signal does have a native Mac app. I use it every day.
It's not, it's an Electron-based app (not bad by default). Even says so on their Github page: https://github.com/signalapp/Signal-Desktop
Unless you're using a non-official version?