@tiawd
If you have not, as of yet, found the time to study Tanya in depth, then I would suggest you do so with the help of Reb Yoel Kahn’s shiurim which are available on the internet. Alternatively, you may use one of the many self-help Tanya books that have come out in recent years. Daunting indeed, but once you have learnt it along with the Rebbe’s explanations, many questions that you have had on Chabad philosophy will fade away. It’s a matter of patience and open-mindedness, something which many people lack, unfortunately.
Your questions on Chelek Eloka would seem quite valid and strong to the average observer, which is totally understandable considering the immense level of ignorance that most in the Litvish community possess whenever it comes to Chabad thought. I’ll give you the benefit of the doubt, however, and, instead of responding to you questions head on as I was initially tempted to do, I’ll just let you do the research yourself. After all no one educate you better than yourself at you age; It’s all about the willingness to learn and discover, something which no one else can provide for you.
I wish you luck that you one day realize the fallacy and absurdity of your questions – You won’t regret listening to me, and I won’t regret the resisting the urge to argue with you.