Of course not, software can always be fixed, I gave you the fixes that normally resolve this. It's just taking too long.
Let's zero in more on the error causing the crash:
Try the fix in post from magicman74 here and other fixes here:
https://answers.microsoft.com/en-us/xbox/forum/...
Several are reporting the System File Checker works. I know you've just reinstalled but perhaps an app, Update, settings change or mod is causing the issue to continue. Run System File Checker and DISM from Step 10 in this checklist:
http://answers.microsoft.com/en-us/windows/wiki...
https://forums.forzamotorsport.net/turn10_posts...
https://xbox-forums.com/threads/forza-horizon-5...
https://xbox-forums.com/threads/forza-5-crash-e...
https://updatecrazy.com/fixed-forza-horizon-5-c...
https://www.ginx.tv/en/video-games/forza-horizo...
https://www.reddit.com/r/forza/comments/qn8nwt/...
https://www.reddit.com/r/ForzaHorizon/comments/...
https://respawnfirst.com/forza-horizon-5-crash-...
Please take your time to try each step in each link, report back progress so I know what else to suggest. I will keep helping you until this is resolved.
_________________________________________________________
Standard Disclaimer: There are links to non-Microsoft websites. The pages appear to be providing accurate, safe information. Watch out for ads on the sites that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the sites before you decide to download and install it.