It's like a fun* little cat and mouse game, you figure out the patterns to block specific traffic, then they adapt and you start again. I even saw some users comment the other day they were being hit with false positives and blocked because the blocking was too aggressive. Fortunately there are companies that specialize in this kind of stuff like cloudflare. But that costs money so it wasn't added until just recently, so it's possible attacks are still getting around that.
*obnoxious
There is a status page that tracks the downtime, it's not totally detailed but gives a bit of information about the problem they're dealing with. The last 2 days of logs are particularly bad 14+ hrs of partial downtime.
https://lemmy-world.statuspage.io/