I'm a relative newcomer myself, just from the time of the protests, and yeah I am also making multiple accounts. My Kbin one I even gave up on almost entirely, but you never know when it may come in handy:-).
I wonder how much of the development issues are related to the choice of languages, if it unnecessarily restricts the number of people who can help, or the political stance of the originator turning people away who are unwilling because of that. But Kbin, Mbin, and other spin-offs are happening, and even Threads and whatnot, so it does seem to be happening, just slowly.
And the interface is somewhat good even now, okay so not quite so "stable" but as you said, that was mostly from DDoS so understandable that it could take some greater difficulty to turn those away.
I expect great things in its future:-).
But either way I'm not likely to leave. (And even if I did, I still would never return to Reddit!:-P)