You’re most certainly part of the problem. You’re like someone who complains about local restaurants closing, but keeps buying drive through. Reddit isn’t better, it’s merely easier, but it’s also a terrible value and bad for your health.
There is nothing positive that Reddit is capable of, that Lemmy is not. It all comes down to shifting the audience. Lemmy keeps improving, while Reddit keeps getting worse. All Reddit has is inertia, the energy of which came from a distant, nearly forgotten push. Put some time and effort in, help build something rather than merely consume it.
I suppose what I’m trying to say is the less we rely on reddit, the faster those niche communities grow in the fediverse. The cost for splitting your energies is that it slows the growth of one and prolongs the antiquation of the other.