Well I don't know if these are "worse", but here's some tentacles!! ヾ(❀╹◡╹)ノ~
1) http://www.mangago.me/read-manga/hakase_to_neko/
2) http://www.mangago.me/read-manga/aijin_incubus/tr/65543/page/58/
(the link is to ch 3, cause that's where the tentacles are, but you might want to start at the beginning: http://www.mangago.me/read-manga/aijin_incubus/ )
3) http://www.mangago.me/read-manga/gingaku_hakase_to_marmot/
4) https://myreadingmanga.info/mentaiko-entwine-english/
If I think of more later, I'll mention them too
I thought of one more!
http://www.mangago.me/read-manga/crimson_spell/mh/v01/c007.2/2/
but it's in the middle of a manga, so if you want to read more of it be sure to start at the beginning!
Those are some nasty af tentacles. http://www.mangago.me/read-manga/erohon_bukkake/nmt/c013/19/