how to "unpack" nested json data into csv-like with jq

having a data eg like:

[    {"user": {"foo": "a1","bar": "b1"        },"data": [            {"baz": "c1.1","beq": "d1.1"            },            {"baz": "c1.2","beq": "d1.2"            }        ]    },    {"user": {"foo": "a2","bar": "b2"        },"data": [            {"baz": "c2.1","beq": "d2.1"            },            {"baz": "c2.2","beq": "d2.2"            },            {"baz": "c2.3","beq": "d2.3"            }        ]    }]

i want to "ungroup" it into a csv-like output

a1  b1  d1.1a1  b1  d1.2a2  b2  d2.1a2  b2  d2.2a2  b2  d2.3

i was able to achieve it (https://play.jqlang.org/s/G8PLRDlxx4Ym3-W), but with a foreach and assigning the data to some variable - well generally it looks pretty clumsy

.[] | .user as $user | foreach .data[] as $d ([]; . ; . + [$user.foo, $user.bar, $d.beq]) | @tsv

isn't there a simpler way?