Trump gave Iran a great deal just so he could announce the peace on his dumb birthday. If the US keeps their end of the deal (it’s Trump after all) Iran may also keep theirs and leave Lebanon be for now. They aren’t doing that well on the homefront as the IS has been bombing military targets and civilian infrastructure. The hits on civilian infrastructure especially will have worsened the internal unrest that Iran was dealing with before the war start. We also don’t know how much control the new Ayatollah has over the country as he has basically been in hiding all this time to avoid being assassinated by the US or Israel. The peace deal would allow them to start rebuilding and focus their efforts fully on dealing with internal unrest. And they could also just use the new funds that will be unfrozen by the new deal to covertly fund Hezbollah and have them fight against Israel in Lebanon.

But yea it’s a shit deal and it will most likely get worse for everyone.