Hi everyone,
I seem to be having a rather annoying problem with 1 (or multiple) mods.
I hadn't played skyrim in a long time and when I recently started playing again, and therefore updated my mods, the attack speed on all weapons (vanilla and the ones by mods)
was increased rather much, so that when wielding a 1h sword or dagger, it's almost impossible to hit something once, and the latter is almost a complete blur.
I tried deactivating my mods, but i still had the problem, and because it affected all weapons I thought perhaps it was a problem with bethesda's patch, but since anyone hasn't had the problem to... To be honest I'm not really that much of a modder myself, so I could really use some help.

the mods I use are the following:
on NMM:

99 percent Pickpocket - 99
A Quality World Map - With Roads - Quality World Map - All Roads
ApachiiSkyHair - ApachiiSkyHair_v_1_3_Fixed_Full
Better Females by Bella - Better Females by Bella Version 3
Better Females by Bella - Makeup Version 1
Black Tower and Black Sacrament Armor pack - Black Tower - Black Sacrament Armor V3-1a
Closer Quivers and Longer Arrows - Closer Quivers v2
Closer Quivers and Longer Arrows - CQv2 - DoODABoOMs Scout Armor Edition v2-2
Crafting 300 - Armoury of Tamriel
Glowing Ore Veins 300 - Glowing Ore Veins 300 2_00
Hair packs of Fallout3 - FallOut3 hairs Natural edition
Interior Fog Remover - Fog Mesh Remover
Lanterns on the Roads - MoreLanterns
Legendary Smithing Upgrades - Legendary Smithing Upgrades v1_3a
Light Blades Armor - Light Blades Armor
Light Wolf Armor - Light Wolf Armor
Lore Friendly Armor Pack - Lore_Friendly_Armors_1_7_2_HD
Lost Art of the Blacksmith - Lost Art of the Blacksmith
Lovely Hairstyles - Lovely Hairstyles v06b
More Hair Colors - More Hair Colors r5
Nightingale Prime - Nightingale Prime Male and Female
No More Blocky Faces - No_More_Blocky_Faces-1_50
Personalized Music - Add your own music to Skyrim - Personalized Music v 4_0
Rings Of Power
SkyUI
Temptress Race - TemptressComplete
TESV Acceleration Layer - TESVAL 03
The Bow of Iorveth - ScoiataelBow
Triss Armor Retextured
True black Shadowmere Horse - True Black Shadowmere
Valdacils Light Armor Robes - Valdacils_Light_Armor_Robes_4_00
Vanilla Tweaks - Arrow pickup fix - - vanilla_tweaks_arrowfix1

And on steam:
The underground lake house
owning goldenglow estate
localized guild jobs
better werewolf.
better riften
mountain crest
auto unequip arrows
TEG civil war restore
the hunters life (hunting overhaul)
winterhold college improved !
dark scout armor
no auto quest start for thieves guild and buy falmer blood elixir
the cartographers map markers
improved followers
light daedric armor
unique guards
fixed followers lite
do you fetch the mead?
complete skyforge
kill them generals
skyrim infinite sprint
lake klinalth tower

If anyone would want to look at this and help me out I would really appreciate it!
Thanks up front

Okay, none of your mods jump out at me as likely to cause an issue like that, so your best bet is going to be disabling all your mods. If the issue is fixed, then you know it's one of them, so re-activate them a few at a time until the issue presents itself again. Rinse and repeat until you find the culprit.

If the issue persists even with all your mods de-activated, then it's likely baked into your save or an issue with the vanilla game. There are still some things to think of, but make sure it's not a specific mod first

TESV Acceleration Layer - TESVAL 03

Not related to your issue but this isn't needed since one of the Skyrim Patches (I think it was 1.4) incorporated this into the game itself.

Artorius.

Open up the console and type in

player.setweaponspeedmult 1

Should fix things.

If you remove a mod that affects that via script while the effect is active, it won't be reset properly.

Well I couldn't find which mod exactly it was, but I tried the cc Astralfire proposed, and although it didn't fix things, I putted it on 0.05 and now is just about the normal attackspeed again, so thanks everyone