Postgresql 11 - service doesn't start
I'm sorry to have to say to you that it seems like you have corruption in your WAL files. Did you remove some WAL files? If so, copy them back to the WAL directory.
If you don't have the missing WAL files (and I see archiving is disabled, so you likely don't have them), data loss is inevitable.
My suggestion:

copy the entire cluster somewhere else (just to be able to restore should you make things worse)
use pg_resetwal to try to reset your wals (see documentation here and please read the whole page so you understand that this will lead to data loss)
try to start again
if it starts, if you don't have checksums enables (it's not the default), pg_dumpall everything (see documentation here) (redirect to /dev/null if it's too big) to check for any data corruption
if it does not start, I'm afraid you'll have to rely on backup, making the data loss even worse

I'm so sorry for the bad news...