Quite clearly you did not come here looking for constructive criticism of that site. If you're not the site builder, I'm not sure what your point was. If you are a contributor to the site, I suggest you contact the site builder/site owner and pass on our comments. I doubt he/she will be too thrilled to discover that we felt like we were banging our heads against a brick wall trying to use his/her site.
I don't need to practice my use of the verb "to be" in the present simple but genuine learners do.
I was going to close this thread but there's a danger that you'll think I did it because you specifically targeted/insulted me with the comment "... you can't really understand what you are blabbering on about". I shall, therefore, leave it to another moderator to decide whether closure is the right thing to do.
Remember - correct capitalisation, punctuation and spacing make posts much easier to read.