The German manufacturers might be judged to lead on design, but not necessarily quality. As far as I can see there are three elements to a kitchen
- hinges, drawer fitments, fancy pull out mechanisms etc. All the companies buy them in from the same few supplies (Hafele or one of a small number of others). those companies have a few different grades of drawers etc. These probably make more difference to how well the kitchen lasts than anything else.

- Cabinets. there are different ways of building with more or less material but it doesn't make that much differnce if well fitted
- Doors. Nearly all are mdf with some sort of coating. quality varies.

Best cabinets I've ever had were from a UK co https://mereway.co.uk/ Complete rigid, solid tops, thicker back panels than any others I've seen. Well worth a look. That was probably c15 years ago and their design options were a bit limited at the time but look better now. We fitted a simple white one in a rental flat that's had a hard life and still looks like new after > 10 years.