The J/22 is a difficult boat to manage in heavy air ( not as difficult as a J/24 which are notorious for wipe outs and sinking ) . They aren't particularly stiff boats, being designed with serious hiking in mind.
If heavy air on a J22 - take in the jib and sail under main alone. Try hard to keep the rudder in the water - easing the main such that that luff luffs and using only the leech for power usually provides enough speed and control.
BTW nearly all modern boats sail poorly and slowly when heeled more than 10-15 degrees.
It seems you never miss a chance to bring up the fact that it is possible to sink a J24, however I would point out that J24s are hardly alone in this. In fact Santana 20s sink at a prodigious rate as well. Secondly J24s are hardly a bear to sail in heavy wind, in fact you can carry the Genoa from 0 up to 20 knots. If anything, they are substantially underpowered by today's standards. My wife and I doublehand ours frequently including in wind at 30+ knots, and all these years later we have yet to sink one. This J24 bashing is really childish. It is a free country, and you can keep bringing it up, however you can also count on me pointing out how stupid the comment is. If you need me to start pulling up news stories of sinking Santana 20s, I can do that as well.