Any which way, write a Steam review that accurately captures your feelings. Because the ONLY way that your opinion matters is if it is reflected in that review score come the official release.
I'll make a review at release, maybe
It's possible the release version could solve a lot of issues, and some my personal issues with the game, but like yourself I very much doubt the release will be the game most have been waiting for.
As it stands I would leave a "mixed" review but unfortunately that isn't an option (is it really so hard to have a 1-5 star system?) I am amazed how when it comes to products it's now simply "good/bad" or "love/hate". I truly do fear for the mindless consumer world we seem to be heading, it's almost as if we're asking A.I. to subjugate us in all things.
I think it would be asinine and childish to leave a "negative" review after having played 1000+ hours. Generally I would say that's only warranted when a game patch has literally broken something (though that has happened with Bannerlord). But I also haven't enjoyed a lot of those hours, because a lot of those hours were spent (by me) with some expectation that resolution would be made towards aspects of the game that have well... been lacking. To be fair the writing was on the wall back in September 2020 that development of this game was not proceeding well, so I mostly blame myself for time wasted, but I have no qualms about accusing TW for dropping the ball.
Though I am still baffled by how TW with it's level of resources has accomplished so little. Again if TW was just a small indie studio of 20 guys, I'd give everything right now a pass, but not when you supposedly have 100 employees. There's definitely some sheninangans going on, my best bet is they probably started working on another game back in 2020. That or most of those employees are simply interns, but even if that's true what are they doing?
It's been pretty obvious TW's only real goal with this game over the past year has been getting it to a state that they can dump the game on consoles. The PC market is pretty dead at this point. As I've said many times, reality is most people picked up the game in March 2020 on PC, played it for like 20-50 hours, realized it was unfinished, but had some fun so they gave it a
Those are what we call sane individuals
Thing is unless tens of thousands of players come back and change to a negative review, you are not going to make a dent in the 150,000 Steam reviews. To me it's all unfortunate as Bannerlord probably could have been, with the right passion and talent, a truly exceptional game. But it's also been pretty clear that the only future for Bannerlord on PC is mods. Modders have really put the base game to shame for the better part of 2 years and TW knows at this point mods will do more to sell their game then they can.