Get an actual main tank. Hydration is a good flex to fill when needed, but shouldn't be starting at least not until he learns the position more.

Get some help for Danteh. It feels like he's deadlifting most of the time. I get that his hero pool isn't the best, but it's good enough especially considering how good he is on them. Linkzr feels a lot like Babybay where they aren't necessarily playing bad as a hitscan, but still has plenty of room for improvement. Maybe someone like Saya could be a good fit since he's stuck behind BQB?

Lastly, flex support is a weird position for them. I think they just need to rip the bandaid off with Rawkus and give Rapel a fair chance. If Rapel can't perform, then try a trade or sign from T2.