Not sure I am understanding your math, since 2012 (the last 11 seasons) they have had 4 regional appearances, losing in the finals by 4 pts, 2 pts & 2 pts in OT. The other appearance was cancelled due to covid. Yes if you want to discount 2012,2013 then technically 2 in 9 but that is not telling the whole story. Other than 2017 & 2018 they have been on a nice run. D1 screwed them as you can relate.
On another note, nice comeback by Dover tonight. They have some good wins against Stark area schools (Lake, Massillon) Have to wonder how much respect you will get out of the D1 schools up north come tournament seeding.