Homsap,
You seem either to be quoting the summary without reading the body of the report (which are very different) or you are being very selective and picking out bits that fit your assumptions.
Inform yourself before posting judgements, please.
Addendum regarding altitudes as an example (from the body of the report):
The rotational speed of air traffic control radar antennas is such that the information they receive is not updated sufficiently frequently for accurate tracking of aircraft that are continuously changing direction and speed.
Errors associated with aligning the recorded radar track with specific points on the ground include random errors and systematic errors. These vary for the different radar heads for a given aircraft track and complicate the mixing of positional data from different radar sources. Pressure altitude data, referred to as ‘Mode C’, from different recorded radar tracks can be more readily combined as this information is transmitted from the same aircraft's transponder.
Some of the Mode C altitude data was automatically flagged by the system as ‘Not-validated’, including a signi cant proportion of altitudes recorded during the accident display. However, this ‘Not-validated’ radar data appears reasonable when compared with the validated radar data and other evidence, such as the motion captured by imagery and results of photogrammetry analysis. Radar data validation is discussed further in Section 1.16.2.