2 rooks vs 1 queen

That's a complicated question to answer. The queen is probably better for "checkmate" if there are many pawns on the board in a favorable way, but if there aren't many helpful pawns to support the queen, but the queen is almost useless is checkmating by herself.

Typically, more advanced players will choose the 2 rooks and then have them defend each other, so neither can be forked by the queen. It really depends more on other variables such as king safety or initiative:

all thing on the board equal 2 rooks are stronger then a queen. 2 rooks can attack or overload a square or another piece. 2 rooks control more squares then a queen. 2 rooks working in union can over power a queen (overload). force multiplier a single piece can only really be in 1 place performing 1 function 2 pieces can perform 2 different tasks. same as 2 minor pieces are stronger then a single rook. the equalizer is of the player with 2 rooks king is weak and exposed. this allows the queen superior mobility to compensate.

Chess.com is mostly Speed Chess and I'd suggest that a Queen is more dangerous in Speed Chess than in Chess played on classical time scales.

The problem with the queen is that its the best piece to do forks.

But two rooks can easily circumvent that by protecting each other, so a fork is never possible. And with two pieces you can attack twice.

The rest depends upon the position.

And yes two rooks can checkmate on their own, something the queen cant do either.