文法訂正及建議

我只顧看幸福的終點了，不記得看自己腳下的路了，跌了一個大跟頭。累了，回首望一望，來時的路上全是我在跌倒時掙扎的痕跡，全是我在徬徨時來來回回踩下的腳印。

During a search for perpetual happiness, I paid little attention to what I had had. So, naturally, I stumbled. In a desperate attempt to regain my foothold, I reflected and observed the scars of my struggles as well as the footstep of my meanders. Indeed, what a life, and what a worthy life indeed!

I just take too much care of my final happiness, but forget the road that I have walked and fall down eventually.I am tired. In addition, I look back the experience that I have struggled and find the footsteps that I have wandered. It is all that I have experienced.

One more for your reference,

我只顧看幸福的終點了，不記得看自己腳下的路了，跌了一個大跟頭。累了，回首望一望，來時的路上全是我在跌倒時掙扎的痕跡，全是我在徬徨時來來回回踩下的腳印。

Being so fixated with the eventual happiness, I totally forgot to watch my steps, and took a huge stumble. Exhausted! I looked back on the path marked by my lumbering struggles – covered by the aimless footprints in times of perplexity.

Errors and Corrections:-
I was eager to reach the happy ending, and not paying attention on my own foot-path where my feet were, and fell when I was tired
Looking back, my traces of struggling all over where I came from were seen.
They were my foot print marks left by me of wandering back and forth when I was panic-stricken.