How to Deal With Players Who Want To Trade Everything?

i agree

I appreciate that.
"When you exchange - have a reason.  Don't exchange without a reason."
That's not bad.
But that reason can be technical and special to the position - or it can be general.  Or anywhere in between.
If a player reasons that many players (or you) aren't comfortable in simplified positions - then that's what he'll look for !  'Reason'.  

Exchanges - captures - checks and so on ...  are Tactical moves.
Have a 'reason' for exchanging ?
If that is valid (it is) - but one should have a reason for not exchanging too. 
That's just as valid. 
Unfortunately - people imagine there's some kind of 'default' that is 'don't exchange if you're not sure'.
That's Invalid  !!
But to each his own.  

One thing that can help is setting clear boundaries for what you’re willing to trade and sticking to them. That way, the trade offers are more likely to stay relevant and not get overwhelming.

Trading is part of the game.
If your opponent wants to blunt your attack by trading off pieces - he might actually increase your attack. Or your winning chances.
By 1) trading off a good piece of his for a bad piece of your's.
2) Making more moves with his piece he's trading off than you made with your piece he's trading for.
3) Using his capture move in exchange for your recapture move where your recapture move improves the recapturing piece or improves your position in some other way or both.
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a good exchanger will do much less of those.
One thing you often see is black playing for exchanges and white avoiding them.
White often works to hold onto his lightsquared bishop and his queen.
Q trades often help black. Because lack of queens on the board often negates white's spatial advantage or lead in development or ability to attack black's King.
But avoiding Q trades is often easy for white.
And if black words hard for that it could even help white instead - even if black gets the trade.
Chess. All about context.

Offer a trade that leads to a blunder/mistake/inaccuracy (your opponent blunders, not you blunder).

Here's an example. I usually do this in a game if my opponent play this opening, idk if my response have a weakness through.

Idk why but the eval bar says I'm better

In the second game isn't black in trouble?
In the first game I'd say white is better. How about Bc4 to continue ...
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Regarding trading down the most classic trade downs are probably just quickly exchanging into a won endgame and the other is trading queens to stop mate.
But there's also other plays like combinations for example.
Zillions of such plays.
Trading off pieces is an aspect of tactics and strategy.
As opposed to a style of play.

"Equal trades aren't always." -Me

Trading a relatively passive knight for a bishop that's all up in your business is a good idea. Trading queens when your opponent's queen is barely doing anything is not a good idea.

Trading when you're already up material is good. Otherwise, it's not good.

I had a game not too long ago where the evaluation went from +2 to -1 (in my favor) after a knight/bishop trade.

Yes, I'm playing as white in there

Wait, I don't think it's an example, forget it

I have deleted it and just left it with the third game