Grenades and Mines being useless

One of the things I’ve really be annoyed about is what a minority explosives have become. Before encountering Grenades or mines I thought they could destroy tanks in about 6 or so hits. But when I gathered about 5 stacks of them and used them on one tank, the thing just wouldn’t die. In real life these explosives that we call “useless” are ending lives in milliseconds every day (no offense). Please make the things mentioned a little more powerful at the least.