Are these sentences correct?

[Arefeh]

Dear teachers:
Are these sentences correct?
1)You could find whatever in this site that you ever wish to find through a site.
2)I'm not that much good or i'm not much good.
3)I confess that i haven't treated you in a good way.
4)I hope that everything about your job is going well.
5)It's a pity that you can't stay here a little longer.
6)If i have time,i will come or if i had time,i would come.
And...
What's the meaning of these sentences?
1)You ditched him.
2)I'm screwed!
Thanks.

[Anglika]

Dear teachers:
Are these sentences correct?
1)You could find whatever in this site that you could ever wish to find through a site.
2)I'm not that much good or I'm not much good. I'm not that good OR I'm not much good
3)I confess that I haven't treated you well.
4)I hope that everything about your job is going well.
5)It's a pity that you can't stay here a little longer.
6)If I have time, I will come or If I had time, I would come. The first expresses definite intention; the second expresses a desire to do something.
And...
What's the meaning of these sentences?
1)You ditched him. You no longer have contact with someone because you have deliberately stopped that contact.
2)I'm screwed! You are in trouble.
Thanks.

..

[Arefeh]

Thanks alot