I think Rafale is suffering from the Swedish problem. For many years, Sweden built great fighters nobody would buy (of those the Swedish would sell to - they were a bit fussy about that). A major problem was that Sweden had an integrated air defence system, & their fighters were designed to work within it. To export them, they had to convince potential buyers that the plane could be taken outside the environment it was designed to work within & still succeed, or build a special export version.
Rafale has a similar problem. The PESA RBE.2 has many of the desirable characteristics of an AESA, but less range than the mechanically scanned RDY-2. For the MN & the AdlA that is bearable, as they expect to use them only in an integrated environment, with AEW etc., are confident in their skill in using the whole package. AEW gives the detection range RBE.2 lacks, & they think the other characteristics are desirable enough to make up for the deficiencies. It was a compromise made with open eyes, to suit their own assets & modus operandi. But foreign buyers don't like it.
It's also been criticised for being underpowered relative to the competition.