A lot of these clauses might be illegal under German labor law. Check with a lawyer. Also ensure there is a clause saying they have to sponsor your blue card. Many countries allow employers to cancel residence to “fire” in violation of labor law.

If the clauses are unenforceable, my suggestion would be to take the contract, get through the trial period and then mention the unenforceable clauses. That’s to say if you really want to go to Germany.