Some people feel more comfortable in simple positions than in complex ones. In these cases even exchanges may appeal to them.
As MelvinDoucet suggests, if you find yourself in many endgame positions... work on your endgame!
A few minor suggestions: instead of making a move to avoid an exchange use the move to develope another piece (gain a tempo). You may also be able to arrange your pieces so the exchange is to your advantage (for example, when you recapture you also develop a piece).
Recently I am playing lots of 10 minutes blitz games (rated around 1400 atm.) and I noticed many players seem like they are only looking for opportunities to exchange pieces without any positional or materialistic gain, forcing endgame positions and/or releasing any tension immediatly. Mostly, I can't see any tactical explanation for that. The time and probably my skill is too low to calculate endgame situations, so these games seem like pure gambling to me. Personally i find it more interesting, the more pieces are still on the board and get quite annoyed for example being forced to exchange queens if I can't see any advantage for my opponent by doing it (If he/she is under pressure I do of course).
So I am trying to keep figures on the board and work on my play to get slight advantages or tempos IF my opponent decides to exchange and also trying to take as less pieces as necessary, but letting them take in the hope of pushing my learning curve a bit.
Any ideas on that? Whats the best way do deal with it?
// p.s. Im not an english native, sorry in advance for any mistakes..