Apple iPhone backup can be corrupted?

Hi, since a couple of months I’m having issues with apps crashing and freezing when I open them the first time or switch between apps. I need to launch an app more then 4 times sometimes until it correctly lodes. I have an iPhone XS and the memory is only 50% full.

service could not find anything and recommend to reinstall which I had already did a couple of times without success. Recently I bought an brand new IPhone SE, restored my backup from ITunes (Aprox. 125gb) and had exactly the same issues on this new iPhone.

this has to be something with the backup data. Is there a way to find this out? Setting up as new iPhone would not work out since I would like to have my photos etc. On the new device.