I think the review bombing is justified tbh. They released the game under the promise of crafting being added fully by the end of the year, and a suggestion of constant hotfixes and such. We had that for 2 weeks after release, then Fatshark went MIA and haven't responded to any concerns or criticism, and have delayed giving out company updates all month. I expect there is some explanation internally, pressures from the higher ups on what to delivery, prioritise monetisation or whatever... But if it is fully down to Fatshark, they've screwed up over the past month.
The base game is solid, but some of the mechanics, balance and bugs are pretty poor, and they appear to have learnt nothing from what worked well in Vermintide. I think the community is giving them such a grilling because of just how good the base gameplay is makes it all the more frustrating that the mission selection is frustrating and the shop and crafting are a bit of an insult to gamers.
I hope they sort the game out, before it dies completely. I'd definitely like to play more of it.