General Grievous and Blocking

I recommend trying to first search reports already opened about your issues then starting a new one. Also, I recommend one report per BUG instead of one report for multiple BUGs. This way it'll have more chances to get the attention of the devs.

I'll try to guide you in this process:

First off his thrust is bugged to where it can lock on to teammates and will not connect when it clearly hits the other person Not sure what you mean to lock on teammates, but if you mean grievous trying a thrust surge in an enemy, spinning around him, and not hitting him, refer to this report here: https://answers.ea.com/t5/Bug-Reports/General-Grievouse-thrust-Surge-is-still-buggy/td-p/7284382

Second off he has a useless power that can get you killed super fast For blocking After a little bit of fighting my block will no longer block enemies even with full stanima... The Disabled Block BUG, more info on it (even how to fix it ingame) can be found here: https://answers.ea.com/t5/Bug-Reports/Disabled-Block-BUG-Block-Stops-Working-No-Block-Animation/m-p/6762835#M13381

I can also get hit threw my block even with out the block break This one can either be a grievous specific BUG: https://answers.ea.com/t5/Bug-Reports/General-grievous-doesnt-block-blaster-shots-in-some-parts-of-his/m-p/7457042#M21568 or a general new blocking issue: https://answers.ea.com/t5/Bug-Reports/Anakin-and-blocking-bugs/m-p/7591116

About Anakin, he's really OP, but devs have already said they'll balance him a bit.