Is this sentence written correctly? Yes or no?

"This is by far the most most disappointed experience and service I've ever faced."
system
kya yah vaakya sahi tareeke se likhaa gaya he?haa yaa nahin?

"yah ab tak kaa sabase niraashajanak anubhav or seva he jiskaa maine kabhi saamana kiya he."
user
nahin, yah vaakya sahi tareeke se nahin likhaa gaya he.shabd "most" ko do baar likhaa gaya he, or "niraash" shabd ko uchit vyakaran ke liye "niraashajanak" ke saath badal diya janaa chahie.sahi uttar hoga "yah ab tak kaa sabase niraashajanak anubhav or seva he jiskaa maine kabhi saamana kiya he."
assistant
<|system|>
</s>
<|user|>
kya yah vaakya sahi tareeke se likhaa gaya he?haa yaa nahin?

"yah ab tak kaa sabase niraashajanak anubhav or seva he jiskaa maine kabhi saamana kiya he."</s>
<|assistant|>
nahin, yah vaakya sahi tareeke se nahin likhaa gaya he.shabd "most" ko do baar likhaa gaya he, or "niraash" shabd ko uchit vyakaran ke liye "niraashajanak" ke saath badal diya janaa chahie.sahi uttar hoga "yah ab tak kaa sabase niraashajanak anubhav or seva he jiskaa maine kabhi saamana kiya he."</s>
