You are saying Saharah was deceiving him right from the start, where in fact this was already countered by Saharah that he didn't deceive him, it was him who trusted the crown prince and also regarding your "almost make suu a monster" as far as I know at one point even Suu verbally said he wanted the power that a dragon possesses, he wanted Saharah to share it with him.
The thing is yes they both kinda suck
But Suu kinda sucks too( ̄∇ ̄")
The crown prince sucks more cuz I can't get over two things he did:
1. He broke Suu's ankle!!
2. He didn't save Nadan... eventhough Suu begged him to.
Now abt Saharah firstly I don't deny that I'm biased af since he has a dragon status( ̄∇ ̄")
Secondly he was willing to give up his power to save Suu so I believe his love is genuine ╮( ̄▽ ̄)╭
I really liked the concept of suu and saharah bc of their personalities. I really like those tropes ya know? I don't really like the prince bc he's kinda annoying lol. BUT THEY BOTH SUCK?!!?! LIKE WTF CANT HE JUST BE ALONE?!!? THEYRE BOTH SO MESSED UP LMFAOO