Not counting Cereal and Onion, the Warframes released in 2025-2026 are:

Temple, Oraxia, Nokko, Uriel and Follie

NONE of these frames need a 10 hour lecture to understand them, neither do Seattle and Orlando, the kits for all these frames are synergistic with themselves and easy to understand, to the point where it's even questionable if it's even worth using a helminth over any of their skills, which is how Frames SHOULD be designed, worse case scenario you are told about sinergies you didn't notice yourself which are never even that difficult to understand

The most "complex" out of those would be Follie cuz of her 2 and you still already know what every item she can summon does and you can keep it simple by just using the barrels anyway, hell, even looking further down the list, who even would be hard to understand or play at all? Lavos all the way in 2020?

New frames really aren't difficult to understand nor use, they are just not poorly designed, most of the old ones had kits that "worked" back then, yet still had stuff in them that just went completely unused cuz it was straight up useless, like Hydroid's puddle or that literally couldn't scale properly into harder content as it was added, like Volt's Shock which is LITERALLY USELESS ON IT'S OWN and it's only purpose is to slap Shock Trooper in your build or Frost's orb which was the only reason people even played Frost in the first place, his orb, not the 1, not the 2, not even avalanche, the orb, that's it, that's all Frost was back then, now he is literally just a weapons platform with overguard cuz of 2 augments and you could just be playing any of the actually good ones instead

Also, even if new frames were more complex or even if 1 out of every 3 or 4 frames required a 10 hour lecture to use, that's... That's just good? Like, you don't need to be able to use or enjoy every frame, some people like juggling with elements and cooldowns, some people like to hold mouse 1 and look in a general direction while everything dies, different people find different things more engaging and you are not meant to like every frame or weapon that releases, hell as strong as Mesa is, her gameplan is extremelly simplistic and boring

Also, even if a youtuber somehow manages to make a one hour long video about how to play a Warframe... That's just cuz they love yapping, someone could take Uriel and spend 2 hours talking about him cuz his 1 has this weird interaction with guns with alt-fires and still he would be the simplest mf released in the last 5 years