Could spend 10 minutes debunking this but will simply say - No, they will bend you over, you are a helpless duckling in a cruel and vicious world
You may be able to clear more tiles, but never all
Have you actually finished it yourself to be saying this? Presuming no
I would have to assume so because I don't believe that would be possible against what I faced, but I also haven't heard of difficulty scaling (of all things) being different across different systems (Windows 11, Chrome, to be clear)
I'd start losing goblins by about the third battle, of course they don't respawn so losing more than 1 per battle means you're weaker than how you went into the fight.
Even with full perks, pyromancers, 30 odd barracks and high level spells - fights quickly became completely one sided (for them) and unwinnable in the traditional sense