I will always support a sim game that I like irrespective of the faults it may have.
They are fixable.
I'm yet to come accross a pc game that isn't buggy in some ways. And as for being a beta tester.... that we all are for any pc game that's released on the market. How else can games be fixed.
There are a lot of pcs out there around the world that have different specs and I'm yet to see a computer operate the same with exactly the same specs
If you enjoy the Silent Hunter series as I do then instead of attacking the Devs perhaps supporting them would help a lot more to get a product closer to being fixed.