A lot of issues that are happening to you and not other players can often be solved by clearing your cache, while this is not a guarentee fix it will work a lot of the time and is the first thing staff will tell you to do.
Step 1: Right click FiveM and "Open file location"
Step 2: Double click "FiveM Application Data" to open it
Step 3: Delete "caches.xml" from inside this folder
Step 4: Open the folder named "cache"
Step 5: Delete everything inside this folder EXCEPT the "game" folder
Congratulations you just cleared your Cache, when first loading into the server you may get stuck when downloading everything again, just exit and launch again and you should be fine.