Speed optimisation PRO needed for WP website

We are looking for a PRO (not just somebody who installs a few plugins) to get our load-times down. The website is https://esport.directory.

Here some of the pages we have trouble with (please do not say that the pages are big - we know that and would like to keep the setup as it is) :

https://esport.directory/casinos/
https://esport.directory/bonuses/
https://esport.directory/topic/clips-videos/
https://esport.directory/topic/tips-tricks/

Please have a look and sent us your opinion and an estimate for the task.
We do not respond to automated messages at all.

Thanks. Michael