The new Excel & text data source connector introduced in Tableau 8.2 only supports = as a criteria. >, >=, <, <=, and <> are not supported. While they can be accessed using the legacy Microsoft JET connector, a) users have to know to click on the little drop-down arrow before building the connection in the first place and b) that connector is not available on Tableau for Mac.
Please add support for those other criteria in the new connector.
[this was released in 10.5 with Hyper support]