Damn I saw @Blunts reaction too late.
Although I tried reinstalling EST2 like 2 times and it still kept crashing.
What i did now to fix it for myself was that i just uninstalled ETS2 and TruckersMP and deleted all my profiles and saves.
I then installed ETS2 and started a new profile and save. (You can start over again or download a profile from internet if you had alot like me.)
Then I bought back all my garages again and everything and installed TruckersMP.
I do not have any crashes anymore. Fast travel works and Double B trailers work completely fine with no problems.