Alacritty is simple and fast[0] (it does have mouse support, but no tabs, sessions, or startup scripts as far as I know. Configuration is all via config file.).
Is that the kind of thing that you were looking for?
Doesn't it feel sketchy to run a terminal that isn't even packaged by Debian? I run a few non-packaged things, but I don't want my terminal, or shell, or kernel to be "some code from a some person on github".
That's strange. I wonder why debian is lagging behind on packaging it? Alacritty is packaged by my package manager, so I never really thought about it much.
In addition, at some point I had a look, and the former terminal I used to use (termite[0]) deprecated itself in favour of alacritty as well so I can't even switch back (I mean I could, but it's now unmaintained.)