Crazy slow ingame but nothing else

[Crownedidiot]

Okay so I have a very good computer I have a RTX 3060 TI and about a teribite of storage, but whenver I play ingame everything is slow and it puts me in limbo. I use a lot of mods, does anyone know any mods that could do this?
The main 2 mods:
Skytils, NEU
Help please

free plugins
minecraft paid for free
SpigotMC
minecraft plugins
mcmarket
mc-market
spigotmc
free minecraft paid plugins
free minecraft plugins
aac free
ewg free
Minecraft Premium Plugins
ewg free download
litebans free
epicworldgenerator free
free schematics
leaked schematics minecraft
schematics
schematics leaked
schematics free
minecraft schematics free
paid minecraft schematics free
paid minecraft schematics for free
free cracked plugins
free cracked minecraft plugins
plugins
featherboard download
featherboard plugin download
antiaura download
xenforo leaked
xenforo for free
xenforo addons