I changed my employer from 'A' to 'B' while was on project. But the petition with the new employer 'B' got denied.

I've found another employer 'C' who is ready to do my H1-B and the process is started. He is actually my middle vendor in this project.
And i am still on the same project.

My question is, will my denial for 'B' hinder the process with employer 'C', while being on project?

Are there any cases where candidates got approval, after getting denied and filing with different employer?

Also, if employer 'B' (the one for whom the petition got denied) has some issues (Bad track record or in the past he might have messed up something), will this hinder my h1B process with employer 'C'?

Please let me know what are my chances for my new approval?