tere are good explanations for most of them anyway.
There are explanations now that we’ve had ages to ponder them. Conversely, the novelization for TLJ isn’t even out yet.
The TFA novel straight up explains how the Starkiller beam could destroy a planet on the other side of the galaxy from where the base itself is located. It just depends on it you want to accept that explanation.
That is to say, you like the movie or you don’t, and that’s your choice. But holding ST and OT up to different yard sticks isn’t exactly fair.