The main issue with this theme (failing to resize) is in a function of wpbakery. All the rows, where row stretch, is set to anything else but default fail to resize and cause issues.
I have "fixed" it for now by setting all the row's to default. This causes the backgrounds not to stretch to the edge of the screen. I have created a class called bgstretch and added a negative margin to that class and added the same value as a positive padding. Added a overflow hidden to the div="box_mode" and everything works. You do lose quit a bit of the ease from WPbakery page builder but me personally i don't mind.
With this issue this theme is not worth $49. I dont know where the exact issue is, if its in the theme of with the version of WPbakery but it should be fixed by the author regardless. The demo version has the same issue on my computer with chrome, edge and firefox.
Also some of the domaincheck text is hardcoded in .js files. I would find it easier to have it in a language file. I had to disable the multilaguage option (didnt need it anyway, so not a deal breaker) cause my website was stupidly slow when the plugin for that was enabled.
It's a shame, i really like this theme and when i saw it i decided it to buy it regardless of the issues it was having just because i liked it so much. It just has some weird issues, the resizing one is the main issue. If thats fixed its an awesome theme which just looks very cool. At the end of the line i am still happy with it, but the code needs some work.