How do you export history from TFS 2010 that includes the user, date and the complete comment (not truncated)?
For example, in Team Explorer: right-click team member
You can also use TFS Rest API like this:-
https://{accountName}.visualstudio.com/{project}/_apis/tfvc/changesets? searchCriteria.author={userName}&$top=100
This will generate a JSON, you can upload it to any online site like https://json-csv.com/ and get the CSV.