Whilst I wouldn't say it's the worst coaster in the uk in anytime (Wicksteed's coaster, Turbo & Hero are possibly nominees) it's definitely not a great ride when you compare it to the likes of Nemy, Blivvy, Air, Smiler and even 13 which all in comparison offer a more exciting, immersive and entertaining experience whilst Rita is merely just there and coming off after seeing the ride in motion round the whole area does leave a disappointing taste seeing it looks a lot better off ride (except that stupid scaffolding near the launch which is horrible).
Possibly the worst coaster at towers, Stealth is better IMO.