Have been considering responding since you wrote about your 2nd CvC loss, and how much you are spending.
However there has been now more imput and more to cover.
First, I was surprised about you telling us your expenditure,it provoked a range of thoughts and on how best to respond.
You are allowed to play the game as you wish, and spend likewise, I'm sure the owners will be grateful that you do what they like.
The actual amount is neither here or there,it will be much to many, and little to others, who have spent or continue to spend much in order to maintain their goals.
One of the things I wondered is, if you would be better of using whatever you spend on bank offers to just upgrade rather than trying to win events, but that is impossible for me to tell.
Your situation reflects what you are doing and the current dynamics of the game.
I have wondered what it would be to start playing a new account now, as any advice given might be outdated.
Much of the game is currently off limits till you have 1 billion poiints and even at this level, the game expects you to do so much,whereas when I started playing this was not the case.
Many events were open, and winnable, levels simpler, CvC entrance started at 5 million, there were no sieges to worry about.
We do not know how much you have spent to get were you are, or your present progress, but I wonder how long you have been playing,given your forum account is new.
It strikes me that, you are trying to run before you can walk,by partaking in features that were introduced to continue interest for those that had been playing a long time,and had already made considerable progress,and also to a play a game alone, one designed for group cooperation, so the game might not be right for you.
It can be played solo succesfully,those that are doing so now probably have time served, been in clans which they are still engaging with, so it's maybe not optimal for you to try right now.
If you are not doing well right now,you could just not play CvC,or destroy the stronghold, but you probaably know how that works from before you built it.