Litespeed webhosting is often expensive, example fastcomet monthly plans with Litespeed Server ist at $19,95 billing monthly.
Use a good webhosting then setup good theme and jetpack boost and use keycdn as cdn, with this your site will load fast in 1,5-2 seconds. Litespeed will not make that faster I never have seen full page loads faster than 1,5 seconds, maybe 1 second but that is very rare.
I see that you buy many hostings, sometimes is not the hosting issue or performance.
Maybe is your theme with full of widgets, sliders, full of plugins or heavy themes (with bad coding)
The best way to test it is to use other CMS like Data Life Engine for example is a good alternative to Wordpress.
Or using a Simple Wordpress theme, cache and less plugins and using GTMetrix, Google PageSpeed, Pingdom Tools to check the Score and speed of your website.
Sometimes the load you see is not fault of hosting, but let me tell you for example GTMetrix have Germany locations and many more.
If your server is in Canada the ping will be more higher if you choose Germany location to test it. If you use US to test it, it will be lower.
Those tools are a estimative and of course your internet speed (ISP) is also important.
Just because is a little slower for you, doesn't mean that is slower to all europeans.
You can use this tool like (HTTP and Ping to test from several countries)
https://check-host.net/
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Nginx is free, LiteSpeed is paid.
Yes you have Openlitespeed which is also free, but Nginx is much better because if free and have many features and configs in Github.
LiteSpeed is good if you have a paid version or if you are new, is good because of .htacess compatibility (apache).
Cheers