no, for security reasons there is no way to dl this game thru a direct download, it must be downloaded thru the game installer which in turn is only available from the ms store or steam
you can purchase (or could originally) a cd version (europe? only i think) but …
that would only install the base game that likely has been mostly updated anyway, meaning im not sure how much you would actually save because you would install then have to update most of the game
This is an ‘online streaming’ game, while lots of people have trouble installing it does take a long time, i might suspect if you can not manage to get it installed it probably would have issue running on that isp - it takes a fair bit of data transfer speed to even load in to the game
i have re installed 3 times since launch (i prepurchased)
it has always taken me as much as 8 hours, i have the cheapest basic cable internet available in my area (no giga w/e) - if your trying to download on less or thru 4-5G wifi you you may have problems
for me ive never had any problem, it just takes a long time to install - luckily thats something i dont have to do very often