First of all -> thank u for being the first guy who tries to discuss this with me.
Now I’m gonna tell u why some of ur arguments are wrong.
We start with Rhino:
U say that he is not op
argument: not helpful,can easily get killed @ long distance
Rhino is meant to be a defender.
Just look at the map terminal.
There are soooo many corners where u can defend as Rhino and when u run into his camping place it’s mostly already over before u even have a chance to spot him.
U can easily get more than 2 kills by just waiting for them in a unexpected corner and if they know your position just switch to the next best corner to do the same stuff over and over again. In the meantime u get totally rekt by him and when u try to focus him there are always 4 more players in his environment which can make your life even make more harder.
That’s just an unfair advantage…
As I said before I see many high lvl players playing Rhino (Nader too) in comp.
And most of them are playing the same way I wrote.
Once my entire team got rekt by one rhino (he had like 70 kills) and the rest of his team had 1/3 of his points. U couldn’t kill him.
To the video:
I just typed in yt “dirty bomb rhino” and randomly picked the first video which says that he is op. The “noobs” have no chance against him as u can see in the video.
So whats fair about that? Is it only because they don’t have enough experience they can’t kill a Rhino? I don’t think so…
so much to Rhino
let’s move to Nader
Saying that Nader req. skill
argument: helping the team to accomplish the objective (not only making frags)
Uhmmmm…doesn’t it even make her more op with that “strategy” (spaming nades on bombspot)
Dealing more than half as much dmg than a grenade from fragger with a max stock of 5 nades…and a 7s recharge…hmmmm 
Now let’s just skip the Martyrdom part because u don’t have to complain about this ability. (just op af, especially indoor)
At the end I just can’t say that these two mercs are balanced atm and I hope they will nerf them…
(Funfact: today durring the livestream shoe just got totally rekt. (He had like 9/30)
In the next round he started playing Rhino and WHO WOULD HAVE GUESSED IT? - he had a positive kd)