I have had many, and I mean many coaches but everyone is way too one dimensional. They all give advice and maybe a few drills that is correct but struggle to give beyond that.
What Penndragon give isn't advice, its the mindset and the way he wants you to approach the game. It will fundementally change the way you play valorant as long as you, yourself is willing to put in the effort. He will give personalised information on how to change all aspects of your gameplay. He is the best coach to learn proper fundamentals(the thing will make you consistent and climbing constantly) which a lot of coaches dont bother teaching properly.
The best thing about is that he is able to give practical advice on anything you throw at him, no matter if you're iron or immortal 3.
His price is definetly undervalued for sure with how much effort he gives, and seems to actually genuinely care about your skill level and not just exchanging advice for money.