"As a child, I was told Spiders felt no emotion."

Arnold C, 1257 1261 1256 1233 bytes

IT'S SHOWTIME
TALK TO THE HAND" _______________________________"
TALK TO THE HAND"|\_____________________________/|"
TALK TO THE HAND"||    \         |         /    ||"
TALK TO THE HAND"||     \       /|\       /     ||"
TALK TO THE HAND"||     /\'.__.' : '.__.'/\     ||"
TALK TO THE HAND"|| __.'  \      |      /  '.__ ||"
TALK TO THE HAND"||'.     /\'---':'---'/\     .'||"
TALK TO THE HAND"||\ '. /'  \__ _|_ __/  '\ .' /||"
TALK TO THE HAND"|| |  /.   /\ ' : ' /\   .\  | ||"
TALK TO THE HAND"|| |  | './  \ _|_ /  \.' |  | ||"
TALK TO THE HAND"||/ '/.  /'. // : \\ .'\  .\' \||"
TALK TO THE HAND"||__/___/___/_\(+)/_\___\___\__||"
TALK TO THE HAND"||  \   \   \ /(O)\ /   /   /  ||"
TALK TO THE HAND"||\ .\'  \.' \\_:_// './  '/. /||"
TALK TO THE HAND"|| |  | .'\  /  |  \  /'. |  | ||"
TALK TO THE HAND"|| |  \'   \/_._:_._\/   '/  | ||"
TALK TO THE HAND"||/ .' \   /    |    \   / '. \||"
TALK TO THE HAND"||.'_   '\/.---.:.---.\/'   _'.||"
TALK TO THE HAND"||   '.  / __   |   __ \  .'   ||"
TALK TO THE HAND"||     \/.'  '. : .'  '.\/     ||"
TALK TO THE HAND"||     /       \|/       \     ||"
TALK TO THE HAND"||____/_________|_________\____||"
TALK TO THE HAND"|/_____________________________\|"
YOU HAVE BEEN TERMINATED

This is my first try programming in the supreme language, so I'll eat my downvotes as I offer no intelligent solution to this problem although programming in the language descended from the heavens.

Here's a compiler if anyone by any chance questions this algorithm.

Stick around.

SOGL V0.12, 141 bytes

↑υΒΦøAo┼Λ■MšH⅛ K∞ΠΘK2╬{t÷ωÆ↓p║9<¤ΓuΞ∫⅛Χxc<Π³‼čΝ═ūψ°ņR⁷|└η▒°Mψ{√ΥΜ┌>½Ψ¹iš℮ē@‰‚ηΨ▓+⁰ρ→ƨ┘ο\β¶⁹ξA6‘'²nΓ:A⌡≥¹↕Ζ,'ŗa;+"⁴ø'½ø' Æ ⁄Æ    ø'⁄ø'Æ∑O’3n{_ζž

Explanation:

...‘                             push a quarter of the drawing
    '²n                          split into an array of items of length 17
       Γ                         palendromize horizontally, with overlap of 1
        :A                       save a copy of that on `A`
          ⌡≥¹                    reverse items in the array (for each item put it at the stacks bottom, then wrap in array)
             ↕                   vertically mirror chars (it tries its best but still has bugs)
              Ζ,'ŗ               replace ","s with "'"s (one of the bugs)
                  a              push the variable A
                   ;+            reverse add
                     "..’        push a list of codepage characters
                         3n{     for each group of 3 do
                            _      put all the arrays contents on the stack
                             ζ     convert the last from number to its codepage character
                              ž    replace [at X 1st number, Y 2nd number, with the 3rd number converted to character]

Try it Here! (the program contains tabs so here is a better program representation)

vim, 373 371 bytes

A ________________
|\_______________
||    \         |
||     \       /|
||     /\'.__.' :
|| __.'  \      |
||'.     /\'---':
||\ '. /'  \__ _|
|| |  /.   /\ ' :
|| |  | './  \ _|
||/ '/.  /'. // :
||__/___/___/_\(+<ESC>:2,12y
Gp
:13,$g/^/m12
:17
8lr jr.ggqayyp!!rev
!!tr '\\/(' '/\\)'
kgJxjq23@a
:13,$!tr "\\\\/.'+" "/\\\\'.O"
qa/_
r ka
<ESC>k:s/ $/_/e
gJjhq33@aGk:s/ /_/g
gg$x

<ESC> is a standin for 0x1B.

Ungolfed

" First quadrant
A ________________
|\_______________
||    \         |
||     \       /|
||     /\'.__.' :
|| __.'  \      |
||'.     /\'---':
||\ '. /'  \__ _|
|| |  /.   /\ ' :
|| |  | './  \ _|
||/ '/.  /'. // :
||__/___/___/_\(+<ESC> 

" Copy to lower half, reverse lines, substitute characters
:2,12y
Gp
:,$g/^/m12

" Non-symmetric part
:17
8lr jr.

" copy left side to right and reverse
ggqayyp!!rev
!!tr '\\/(' '/\\)'
kgJxjq
23@a

" swap characters on the bottom half
:13,$!tr "\\\\/.'+" "/\\\\'.O"

" shift underscores up one line wherever an empty space is available
qa/_
r ka
<ESC>k:s/ $/_/e
gJjhq
33@a

" misc
Gk:s/ /_/g
gg$x

Try it online!

And to clarify the explanation you were given as a child: While it's true that the only emotion spiders feel personally is hatred, they are capable of sensing fear at a distance of over 50 meters.