That seems like an insane number for an experienced person--that's almost an application every two days--and a yield of less than 1% which presumably wasn't even a compelling offer.
My job search looked a bit like that. Luckily, I had just a few connections from grad school, which of course immediately led to interviews and offers while my hundreds of one-click applications lead to form rejections or have been ghosted. But without those connections, I'm not sure what choice I would have.
Maybe that's the problem. Those platforms are full of garbage job ads. I've never used such platforms (but again, I could be missing something).