Can anyone assess this text please?

This subject(lecture) turned out to be a disappointment. From the first lecture I was demotivated for several reasons. Firstly, I was expecting a completely different knowledge(topic) from this subject. Also, it is worth noting that, in my view "intercultural" management should include a variety of the areas together and should not be overly abstract. Secondly, the teacher often was using academic terminology, which in turn evoked some antipathy to the subject. Moreover, in general, a the method of teaching was very boring and monotonous, which caused only a great dislike (me to dislike it). In this regard, I missed a lot of lectures, which influenced the results of the exam and caused demotivation in the future. I did not pass the exam and this was very much reflected in the subsequent study blocks.

Dear Yury,  You have mastered the English rhetorical style.  You made a list and explained your points very clearly.  Nice work!  I put some other word choices in parentheses.  Writing conclusions is difficult.  I would rework the last two sentences.  It seems to me, you have written that you did poorly on an exam, became unmotivated, and your disinterest was reflected in your later work.  How awful!  Keep writing in English, you have done a good job. 

A roaring successful sportswoman (athlete): Billie Jean King

Objective: Write a competition entry about one great sportsperson that you'd include in a TV program about sport.

Entry: In my opinion, playing a game or doing a sport doesn't mean just winning medals or taking up sport challenges. One of the most inspiring sportperson (athletes)  that I would definetely mention in a TV program, is the retired tennis player Billie J. King.

The american athlete, not only was an outstanding player, but also a fighter for the womens' rights and a symbol for the LGBT sportpeople.

During her career, she won 197 matches at the Grand Slam competitions and 39 titles. She respresented the US in international competitions such as theFederation Cup.
At the same time she's considered as a pioneer of the womens' rights in tennis, especially because of the huge success she achieved in the so-called Battle of the Sexes, a tennis match played in 1973 against Bobby Riggs, who had earlier despised female tennis. (Yet), she supported the rising of the first female professional tennis competition, in the late 1970s.

Finally, Billie J. King was the first athlete who came out ot the closet, in the 1980s, receiving several credits (much acclaim)  by LGBT associations, and being chosen as the USA delegate at the Sochi Olimpic Games in 2014. Nevertheless she has been a vegetarian for many years, proving that everybody can meet with success (be successful) no matter what their diety choises (choices).

Dear Nicholas,  Good job!  I corrected some spelling, grammar, and word choice.  I am a big sports fan and hope that you post something again very soon.