You said you have dutch passport so I guess your bank is also dutch. Did you send them bank statements in dutch or english language ? And what exactly did you translate with deepl ?
Always tripple check. This Visa application is a very tricky thing. You can do 1000 mistakes if not plan and recheck everything with military precision.
I don't understand why did you have income issues with a soft power DTV ? Income is not necessary for soft power DTV ? Please specify why exactly they rejected you ?