Is it really a surprise that Chester commited suicide?

I know this question might hit people right in the face
and to be quite honest, I never really thought much into it either
until I just recently started listening to some of Linkin Park's most popular songs
and I seriously payed attention to the lyrics.

Yeh, back then I was quite young and I would say my English wasn't the best
to notice that the songs actually have all been highly depressive and suicidal...

Am I the only one that noticed that?
And if I wasn't, was there anyone who would have stepped in?
Obviously we don't know what happened in his private life
but apparently he did use music to express his feelings.

A few examples of what I mean are for example:

In the End
"I tried so hard and got so far but in the end it doesn't even matter"

One Step Closer
"Everything you say to me takes me one step closer to the edge and I'm about to break"

A Light that never comes
"Waiting for the light that never comes"

Crawling
"Crawling in my skin these wounds they will not heal"

Heavy
"I'm holding on, why is everything so heavy?
[...]
I keep dragging around what's bringing me down
if I just let go I'll be set free."

Breaking the Habit
"I hurt much more than any time before, I had no options left again."

Burn it down
"We're building it up, to break it back down."

What I've done
"I'll face myself, to cross out what I've become, erase myself"

Numb
"I've become so numb I can't feel you there"

These are just a few snippets that I got stuck on
and those are songs that got released over the years
so I am wondering, is it really a surprise?
How much pain can a person actually take?
And he apparently had the pain for several years
and it did not seem like it changed in any way if we pay attention to the lyrics.
Sometimes he maybe got up again and tried, like in Heavy
but not too long after that really depressing songs came out again...

I don't think I ever payed as much attention to all of Linkin Park's lyrics than I did these days
and it really makes me wonder if other people have been noticing it, too?
We all have been hyping Linkin Park songs for so many years
and probably in some way some of us felt like someone understands the struggle we go through
but did anyone ever notice that those lyrics are not ours, it's not our story but his?
And that all these years we pretty much have been presented that big part of his depression...

I don't actually know where I'm going with this post,
it just kind of made me sad that every single song I listen to them sounds like a suicidal note...

Merce~