Game keeps crashing (different occasions)

Hello everyone! :)

sadly my Game is kind of unplayable for more than a week now.

First it was crashing a lot when traveling or placing lots (when i wanted to travel, it went on the loadingsscreen and then just crashed after  a few seconds; when placing lots, it was randomly, sometimes after 1 , other times i could place 4-5) until it didnt even start anymore (i got stuck on the loadingscreen after the white SIMS/EA Screen).

I have tried vanilla testing (crashing sill happened here as well) , folder refresh, uninstalled the game and the app. After the folder refresh/game repair, it worked for a little while. So slowly I redid all my mods (checked exactly when the release/update has been etc).  It worked for a little, a few hours. After that, there was another issue:  i wanted to change my sims (mother & child) used: cas.fulleditmode and went into CAS (with MCC), changing them wasnt an issue, when i safed and wanted to go back into the game, i got into the loadingscreen for a few seconds and it crashed again.  I have tried going into cas from the world to change househould, the same happened (with and without "cas.fulleditmode, with and without MCC). After it happened a few times again, my game wouldnt load/start at all anymore (crashed on the blue loading again). Soooo I did all the steps again, re-installed, repaired, vanilla etc. now i got a few mods back bit by bit (again) and tested after almost every mod/cc i added, game loads again, but the crash after editing in CAS still happens.

I am super frustrated with it, especially after trying so many different things. On top of the above mentioned things I have also tried:  I tried graphics card changes (updated drivers, tried to run it from NVIDIA and Intel, firewall/defender check ups (if anything might block it), starting in dx9 version..

I have been reading and searching in the forum and almost tried everything that I have found. 

I really would appreciate any kind of ideas/help!