Nah, 30's fine... I'm only 10 stone.
I'm the same weight as you and have the same experience with most hub motor e-bikes over a number of years, not easy to pedal and not remotely like a good normal bike, despite using much higher tyre pressures than you. Quite a few are absolute pigs, despite having free spinning hub motor wheels. So it's not all about the hub motor, though it sometimes is. Often the bikes themselves fall short in a number of ways, poor tyre types, poor frame design or general geometry making for inefficiency in cycling etc.
The better crank drive bikes are mostly better for cycling without power, some much better. One I owned for a few years, a Giant Lafree Twist, was so good that I never turned on the power on leaving home until I got to a hill, which could be up to three miles from my home in one direction.
Another approach that can pay off is to start with a good road bike and add a kit hub motor that's known to be very free running. The Cytronex company have always used this approach with the Tongxin motors and their bikes are noted for their free running characters and often used with power off. They only have a tiny 4.5 Ah bottle battery giving 20 miles range for most with reports of up to almost 40 miles for some bearing witness to that.
Whenever I or anyone else posts about the poor cycling character of most hub motor e-bikes, the same comments are received about brakes binding, freewheeled motors etc that you have received, but having spent some years in the cycle trade and having over half a century of knowledge about adding power units to bicycles, I obviously know more about those issues than most. The fact is that you are not mistaken, few hub motor e-bikes ridden without power switched on are remotely like good unpowered bikes.
So why do so many insist they are? One reason is of course that personal cycling strengths/abilities/experiences vary very widely, which makes the experience of others often irrelevant. Also many of today's cyclists scarcely even know what a good bike is like, since their cycling years and experience after an inefficient childhood Raleigh Chopper have been through a thirty-four year era of the "mountain" bike, most of which have been and still are very poor as on-road bikes. Another reason could be that knowing a hub motor has a freewheel and finding that it spins freely when static tested, they make the assumption that the bike must be free running and believe that assumption rather than the evidence of the actual experience.
There may be as ever some furious rebuttals of what I've posted here, but I probably won't bother to respond to them, since past experience on this subject shows that is mostly a waste of time.