I'm going to take a different tack with this question. fabiosav, I think you've provided enough information to make several observations about your progress to date. I want to make it clear that I am not speaking as a coach, but just as an athlete, like you. You said to be honest and not pull any punches, so I won't. You're a former world-class competitive athlete in one of the most demanding sports I know of -- cross-country skiing. I actually think that sport has a lot of similarities with cycling. Knowing nothing else about you, I would predict that you could be a good cyclist with a good training program in both volume and intensity and structure. As you noted, your weight is working against you, especially on the hills. But, I know of no better way to get your weight down than spending a bunch of hours/week on your bike. My weight went from 212 to 172 in 6 months, largely from just spending 2 hrs/wk in the saddle. Don't worry about your 20 years of "tapering." Hell, I "tapered" for 30 years and it only took me 6 months to get back in reasonable shape.
As to your current 20 min power of 220w, I'm going to say that it's not very good after 2 years of training, on either an absolute or relative (w/kg) scale. On the gold standard w/kg scale, you are at the level of an "untrained" cyclist. I've got overweight ladies in my cycling club who probably have 220w 20 min power. So, what do I honestly think of it? If you were an overweight female who was never a competitive athlete in any sport, I'd say, "Not bad." But, in your case, I say, "It's lousy and you should definitely expect to do much better. Fire your coach and change your training program." Personally, I think your small volume of training has a lot to do with your lack of progress, but that's just a cursory observation. A qualified coach would look at your whole program, including volume, intensity and structure.
There you have it. Now, the experts can come in and trash my observations.
As to your current 20 min power of 220w, I'm going to say that it's not very good after 2 years of training, on either an absolute or relative (w/kg) scale. On the gold standard w/kg scale, you are at the level of an "untrained" cyclist. I've got overweight ladies in my cycling club who probably have 220w 20 min power. So, what do I honestly think of it? If you were an overweight female who was never a competitive athlete in any sport, I'd say, "Not bad." But, in your case, I say, "It's lousy and you should definitely expect to do much better. Fire your coach and change your training program." Personally, I think your small volume of training has a lot to do with your lack of progress, but that's just a cursory observation. A qualified coach would look at your whole program, including volume, intensity and structure.
There you have it. Now, the experts can come in and trash my observations.