Not terribly realistic. The Enterprise wouldn't have lasted that long against the Executer. Turbolasers would have been constantly hitting it and would have torn it to peices A deathstar shot it couldn't out run. Defeating tie fighters is plasible... as is desrtoying a SSD... that is if they managed to destroy the shields (which they wouldn't have). With the shields up they would have been mincemeat.
not that I personally want to get involved in the ultimate debate of eternal virgins , but when it comes down to it under the right situation, the brilliance or stupidity of the command crew, the Enterprise could get wiped out by an SGC bc-303 , like the Prometheus, or bc-304 like the daedalus and there host of x-302a
hell a alkesh or a ha'tak could
again depending on how bright or how dumb people are being,