my recommendation will be that just add a table width, and then set into the cols a value that distributes the available width, the exact distribution will depend on your needs, however i have prepared example using values that i think you were trying to replicate.

nested tr for get this construction, where i have each cycle inside another each cycle. If there another way to get construction like that, i will glad to see it.

in the example i have prepated you can see a different way without nesting, also another recommendation will be that you don't set overflow: scroll for all the cells, and instead only do it for cells that its content is expected to be large, so don't do it for the header cells.

https://playground.jsreport.net/w/anon/BG1GgqNg

for the case in which overflow does not work (meaning that it does not make the cell to text wrap) i recommend that you just don't trust what the office preview shows you, i mean that you should download the output and check how it looks when you open the file.

I did a test and when the data in cell has spaces fiveThree fiveThree five... (like it is expected for the text wrap to work) I've observed that it looks different when opening the file locally.

however for the case in which the text does not have spaces fiveThreefiveThreefive... the wrap works but it hides part of the text (which is the result you don't want), basically right now in a case in which the text is long and it does not have spaces it won't work as you lile.

<tr>
<td style="width: 100px;">Value 1</td>
<!-- Rest of the columns -->
</tr>

Thanks