Using SELECTEDVALUE with SUMMARIZE

I managed to solve this and thought it might be useful for anyone else.

I set up Variables with the initially mentioned measure and used the SWITCH combined with SELECTEDVALUE to test if the name matched and returned the correct VAR.

RETURN
SWITCH(
    TRUE(),
    SELECTEDVALUE(ratings[rating]) = "Atmosphere", _atmosphere,
    SELECTEDVALUE(ratings[rating]) = "Cleanliness", _Cleanliness,
    SELECTEDVALUE(ratings[rating]) = "Drink", _Drink,
    SELECTEDVALUE(ratings[rating]) = "Service", _Service,
    SELECTEDVALUE(ratings[rating]) = "Value", _Value
)

VAR example: 

VAR _Value = 
AVERAGEX(
    FILTER(
        SUMMARIZE(
            ALLSELECTED(ratings),
            [response id],
            "Atmosphere", CALCULATE(AVERAGE(ratings[score]),SEARCH("Atmosphere", ratings[Translated Rating],,0)),
            "Cleanliness", CALCULATE(AVERAGE(ratings[score]),SEARCH("Cleanliness", ratings[Translated Rating],,0)),
            "Drink", CALCULATE(AVERAGE(ratings[score]),SEARCH("Drink", ratings[Translated Rating],,0)),
            "Food", CALCULATE(AVERAGE(ratings[score]),SEARCH("Food", ratings[Translated Rating],,0)),
            "Service", CALCULATE(AVERAGE(ratings[score]),SEARCH("Service", ratings[Translated Rating],,0)),
            "Value", CALCULATE(AVERAGE(ratings[score]),SEARCH("Value", ratings[Translated Rating],,0))
        ),
        [Food] <= 2
    ),
    [Value]
)