Any tips on reading long-winded Japanese sentences where the most important part is at the very deep end?

So I have been studying Japanese for a long time and has reached upper intermediate level, but I sometimes have difficulty parsing long sentences.

Like, this one:

フェミニズムは、政治的・経済的・個人的・社会的な面におけるジェンダーの平等を確立することを目指す、一連の社会運動と思想のことである.

The main structure is フェミニズムは……思想のことである, with tons of descriptive words and phrases that add more meaning to the main object in the middle (…..)

I usually forget what the sentence is about when I reach the end because the middle part is too long. I understand that this is how Japanese sentences are like, that word order is the opposite from standard S-V-O languages.

So just wondering if you have any tips on better reading long sentences? I feel like I have to hold my breath until the end of sentence to reach the final and most important word and then exhaust the sentence energy, if that makes sense.