WebPerf my website loads unsually slow

php 7.3.8
nginx 1.17.2

this is basically a wordpress and takes 7 seconds to load an uncached page and i have no clue whats going on. wp-admin dashboard takes also 7 seconds to load each page
i installed wordpress normally so never used the menu option.
site gets 30 visitors daily and barely 120 connections

im on a dedicated server dual xeon 5520, 24gb ram and ssd and my average load is 0.3 and dont have any sign of bad drive.

ive disabled all wordpress plugins and it still loads as slow as ever.
ive opcache and pagespeed enabled.i once Both disabled and site still loads 6-7 seconds.

nginx.conf
https://pastebin.com/1pBAVdqv

fpm conf
https://pastebin.com/NtHMRJNY

pingdom website report extremely long waiting time (the result is same even if its server push or not)
https://i.imgur.com/KQt8Jwp.png
https://i.imgur.com/cCspUew.png

fpm slow log does not log anything so im not sure what the issue s

my.cnf is untouched since i installed centmin few weeks ago.
really appreciate any help of what issue im having

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its not that simple. as i said, even wp-admin is extremely slow https://i.imgur.com/PO49Cgr.png

it takes 7 seconds to even go to plugin page
and it doesnt load those images

 

not sure if it is. i did create a fresh test wordpress installation and it loads under 2 second despite having 17mb images in first posts. Im really at loss here. I have disabled all plugins in that main website yet it still loads so slow

 

well before i read your post, i fixed the issue somewhat??? but still had no idea what the cause was. the site now loads in wp-admin 1-2 seconds

and first byte went from 7 seconds to 400ms for uncached pages in wp-admin
i just created a new fresh db and db username and exported my posts/menus from my main to my new site and all data has been successfully migrated with wordpress export/import features

so when did the whole sloweness started?
when i did mysqldump and mysql restored to a new database and user and did cp website files from original to new path and then did chown -R with nginx group

 

well im on a dedicated server where most of my friends are hosting discord bots which mostly consumes ram rather than cpu, and im the only one hosting an actual website though
but heres the attached logs
https://pastebin.com/E6XDJPQW

 

large images slows down website, that is given. But my prior issue was the fact that verything was loading slowely, even in wp-admin control panel. Just trying to navigate through takes 7 seconds per page load

although i have no idea the cause of the whole slowdown, but i will use your recommended plugin should the global slowness happend again. for now, installing a brand new wordpress and iimporting posts fixed this issue as my site loads fast again now.