1. Yet he was pretty much dedicated solely to the will of the force; he viewed knowledge of the force as being infinitely greater than simple prowess with a lightsaber, and he was very much out of practise.
And yet he's still the most powerful Jedi to that point, able to beat multiple masters at once one of whom being a Vaapad Master, and able to disarm Sidious in lightsaber combat (ROTS script)
"YODA unleashes a ferocious assault on PALPATINE, causing him to almost go over the edge. The Dark Lord drops his lightsaber" - The ROTS Script
2. The fact that with all his skill (which was much greater than Dooku's and Sidious'😉, he still wasn't able to overcome either in lightsaber combat speaks for him being technically very poor, otherwise he should have owned them.
Your wrong, in AOTC Dooku was forced to run, in Dark Rendezvous he owns Dooku while he is distracted, and once again Dooku runs. And in the ROTS script he overpowers and disarms Sidious in straight lightsaber combat.
Yoda would beat her ass.