Why does love become too complicated in our generation?

I watched a video of someone asking a 92 year old man about the moments that he was really glad that he had in his life and the old mad told him that his marriage is the best thing that happened in this life, he lived with his wife for 52 years without problems and loved each other so deeply until she passed away and he feel so empty without her and waiting his time to finish so he will join her.
This man made me think if there's any chance that this type of relationships can happen in our generation? We always hear about someone who cheated on his partner or couples that we thought were perfect and they broke up or divorced.
And we see a lot of people get rejected because of silly reasons or have silly problems and they can't go over it, that makes me wonder why this happens all the time these days, and the thing that makes me furious that most of these reasons can be solved by not being a jerk or an asshole.
Why does love become too complicated in our generation?
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