1988 ford tempo gl, help

:nono: Hello I came here for some Ford advice as Im stuck ..
I recently replaced inner and outer Tie rods, and Drver side ball joint..
Now I had to replace driver side brake Callibar.. Low and behold we found out that the bolts are stripped , i hope Im making some sice out this.. and what would make the bolts strip...My friend also says it has something to do with the barings and hub unit ? Or iis it my front axel is finally dead...