The Netherlands offers the right to remain silent. All European counties I am familiar offer something similar. On the European level, this right has recently been affirmed. [1]
In the Netherlands, improperly obtained evidence is indeed not excluded in the Netherlands. Improperly obtaining evidence is a separate crime that does not taint the case for the initial crime, and is prosecuted separately. However, improperly handled evidence (e.g. broken chain of custody) is normally excluded.
In practice, improperly obtained evidence is not a major problem, it will in itself not help convict an innocent person. Improperly handled evidence however, can easily lead to an innocent person being convicted.
[1] https://www.whitecase.com/insight-alert/european-court-justi...