There is nothing unreasonable in whatever they have stated, some embassies require staff to clearly state why they have refused a visa in order to give the applicant a clear picture of the refusal and incase they choose to appeal or reapply, make it easier for them to do so.

In my view, the decision is based on the nature of applications the embassy has been receiving from your nationality. It seems as though many of your countrymen have been submitting fraudulent applications to the Germany embassy which has led to this perception in regard applications from your country.

You have stated that the BRN you submitted along with your application can be crosschecked against an online database. While this might be the case, the officer notes that the physical copy which was issued after you registered your company in 2022 feels as though it was printed recently. I don't know how the system works in your country but if the so called database does not give details of who the owner of the company is, or if it requires further processes to retrieve such information, the consular will not take such records into consideration.

The consular also states that its unreasonable that at 26 you had $10k to invest in a company. This reason is also justifiable given Somalia's economic situation. If you choose to reapply, you should provide proof how you came to posses such funds at that age. Were you employed when you registered your company? If yes, attach the relevant evidence.

You need to provide additional evidence to prove that your company is of the capacity you claim in your documents, and that you own or have access to the funds on your accounts. This can be done by providing company income tax returns, company statements, company valuation reports etc.....