CSM Odious

The new log gives us a better answer. I would not remove EUP completely yet.
LSPDFR is still trying to load character data that no longer exists:
- Last selected character: Lucifer Morningstar
- Failed to find last character
- Failed to find the default male and female characters
- Falls back to the dummy character
- Tries to change the player to Ben J.
- Crashes inside Rage.Player.set_Model
So this looks more like the LSPDFR character installation is incomplete or corrupted, rather than only an EUP problem.
I would do this:
1. Back up your current lspdfr\chars folder.
2. Reinstall a clean copy of LSPDFR over the installation, especially:
- lspdfr\chars
- lspdfr\data\outfits.xml
- lspdfr\data\cop_presets_outfits.xml
3. Do not restore the Lucifer character or any custom character files yet.
4. Start the game with only RPH and LSPDFR and confirm that a completely stock character loads.
5. Add EUP back only after the stock character works.
There is also a strange detail in the log: the game is installed under the Epic Games folder, but RPH reports it as the Steam version. That may not be causing this specific crash, but I would also verify the GTA V installation and make sure files from different game installations have not been mixed together.
The important part is that deleting only the current character was not enough. LSPDFR is failing to find its stock fallback characters too, so the base character files need to be restored.

Hello,

You are missing files for a plugin

There's also no crash in the log. What is the issue you are experiencing?

Your log shows RPH recognizing GTA V 3725 as supported, and LSPDFR begins loading normally. Since the game works when dinput8.dll is removed, the crash is most likely coming from an ASI plugin or loader rather than LSPDFR.
Temporarily move every .asi file out of the GTA V root folder, along with the lml folder, but leave dinput8.dll installed. Then test again.
If it loads, restore the ASI files one at a time until the crash returns. Make sure your ScriptHookV/ASI loader and every ASI mod are versions compatible with GTA build 3725, not files installed after the recent game update.
Your log also shows Lenny’s Mod Loader failing to initialize, so I would test without LML first.
If it still crashes with dinput8.dll present and no .asi files installed, replace dinput8.dll with the version that belonged to the working 3725 setup. Also verify that the downgrade restored all required 3725 files, not only GTA5.exe.

(if i remember correctly) -so make sure these files from your downgrade was put in
GTA5.exe
GTAVLauncher.exe
GTAVLanguageSelect.exe
PlayGTAV.exe
steam_api64.dll <- if you use steam
update\update.rpf