I encountered 2 autoclickers, 1 flying guy in bedwars nd 1 people auto-kill and destroyed bed everyone in bedwars..7 cross-teaming..2 in skywars..5 in bedwars
What are the hacks you have encountered

dude came on my smp server and somehow spawned in a bunch of withers and ender dragons and charged creepers named LOL, then made a lava mountain(he had no operator permissions, he just joined)this is a lot of griefing, but still lots of hacking

Let's see. Bhoppers are common, scaffolders, kill aura, I play uhc so xrayers, saw a 15 block reacher once, but my favorite is still this one. This guy scaffolded to mid in a skywars game, bhopped on a bunch of people, and then did the thing where you drink a jump pot and then if you have good cps you can place blocks to go up really fast, except he jumped like 150 blocks and did it.

Let's see. Bhoppers are common, scaffolders, kill aura, I play uhc so xrayers, saw a 15 block reacher once, but my favorite is still this one. This guy scaffolded to mid in a skywars game, bhopped on a bunch of people, and then did the thing where you drink a jump pot and then if you have good cps you can place blocks to go up really fast, except he jumped like 150 blocks and did it.
That's hilarious. I've always thought of how scaffold imitates the jump-boost tower, but I've never thought of them combined.

A couple Bhoppers, maybe some kill auras (hard to tell if they're autoclicking or using kill aura) and a ton of autoclickers

what is kill aura?
Just your typical head-twitching, jumping, speeding, sword-blocking PvP hacker. At least I think.
what is kill aura?
Just your typical head-twitching, jumping, speeding, sword-blocking PvP hacker. At least I think.
kill aura is thorns infinite basically. or a kill aura, a radius around you that no entity can come into or they die immediately

what is kill aura?
Just your typical head-twitching, jumping, speeding, sword-blocking PvP hacker. At least I think.
kill aura is thorns infinite basically. or a kill aura, a radius around you that no entity can come into or they die immediately
But it's not "thorns." With killaura you're basically just attacking in all directions at once, right? Not affected by players hitting you.

I've seen hundreds if not thousands of hackers, and not once have I seen one that "insta killed" anyone.
I, personally have encountered fly hackers and killaura, and aimbotters, all from 1 person SunnyBear3617.