KISS doesn't get the "credit" from critics because critics tend to not like what they are singing about. Lets face it, KISS songs are fun, they are about girls, partying, and so on. Just because they are not signing about being depressed and changing the world critiques were hard on them.
It is not like they could not play, I am sure that they could play just as well as any of the bands that are known for playing super difficult music, BUT, what they did was use a formula.
Awhile back I read an article about Will Smith, him and his agent sat down and looked/reviewed every summer blockbuster for that last 10 years (I think this was right before he made Independence Day) and they "cracked" the formula, they knew there had to be action, they knew it had to be bigger than life, they knew there had to be special effects, they knew the release date needed to fall in a certain area of summer and they knew what kind of characters people paid to see and what raiting the movie needed to be, usually PG 13. I am not a huge Will Smith fan but lets face it, his summer movies make tons of freaking money, the guy sticks with the formula, for the most part.
Well, KISS cracked the code too.
1. Play tunes that are fun
2. Play tunes that other people can sing with and/or play (imitation is SO important)
3. Have a gimmick (Makeup)
4. Give the fans a HUGE show, don't act like YOU are doing them the favor but KNOW they are doing you the favor by showing up
5. MERCHANDISING
6. Go to towns where other bands won't go play and become that towns "Cool thing" to do/see
7. Treat your fans as the most important thing in the world instead of being mad when they want a picture or autograph
For KISS it really was not about being the best musicians in the world (Ala Rush) it was about having fun, making money and being huge.