The getting fired part is a two sided sword though. I have to give notice up to 6 month in advance (I don't know the exact number it's a bit complicated). In theory I can dissolve my contract ("Auflösungsvertrag") on the spot but my employer has to agree to that.

It's generally a good idea to have longer periods of job security but for someone who can (in theory) get rehired quickly the laws can get in the way, too.

There's also inflexible stuff that gets in my way quite often. For example I have to rest for 11 hours before I can work again and can only work 11h/day without bureaucratic hassle. I get that it's meant to fight abuse but I'd prefer to have an easy way to waive these rights.