Tell them to resign?
Nobody resigns

@TheImposter achieving stalemate against someone who is that emotionally involved they are purposefully trying to drag the game out is always something to celebrate.

@TheImposter no, the person not resigning it playing on to achieve checkmate or stalemate. The person purposefully making sub optimal moves in a vain attempt to teach some misguided lesson, they're the poor sport and the ones wasting time.

Man, you are a 1400 LOL. It is funny that you even talk about some "disrespect". Disrespect would be to drag a game against a titled player, not against you LOL
Your opponent had counterplay (the queenside passed pawns), and it's bad form to resign before you run out of threats, however minor they may be. Your posted game didn't end until the last passed pawn was taken, and that seems about right for your level of play.
You clearly aren't masters. If you were, YOU would have resigned by move 20, when black was up 3 pawns (connected passed pawns no less!). Finishing the job with a material advantage should be simple, but even then, finishing positions like this one is good practice.
I once had a tournament games where a young opponent (who was a shade better than you) had the edge on me, lost it, declined a draw offer, re-offered the draw only once he reached a lost position (which I had to decline), then played through to checkmate. Did I take offense? Of course not.
Afterwards, we went over the game and explained where he went wrong, and where he might have retained his advantage. He didn't know he was lost when he re-offered the draw, and he'd never seen anyone mate with king & queen without check until the final move (which is a very easy way to handle it when you're in time trouble, though I still had three minutes left, which is plenty for that kind of ending). His knowledge of the endgame improved just by the simple fact that he saw how I finished a won position.
Some folks don't like having to work to finish the game (a friend of mine who once played Sam Reshevsky said he was particularly impatient about it), but every player is trying to learn, so no player should ever resign so long as there is still something to learn, even if it is only how the other guy is going to finish.

@TheImposter is 939 rated. There is no way I would ever resign against an opponent of that rating. Chances are you will mess up.

@TheImposter your highest rating is blitz which is in the 1300s. At your level, winning a "won" game is extremely hard. Especially on a consistent basis. No one should ever resign at your level. Demanding they do is poor sportsmanship, dragging a game out on purpose is even worse sportsmanship.

@TheImposter, if an opponent wants to throw away initiative to try and by time, that's up to them. Usually I'll punish such tactics.

@TheImposter either you're good enough to win, in which case is should a quick finish. Or you aren't in which case the decision the play on is merited.

@TheImposter exactly, if you're not paying full attention, just making quick moves, especially at your level, mistakes are inevitable. This is why no one should ever resign to you.

No one ever resigns on this website unless you're a titled player. It's so annoying playing against players who are down a queen and a rook or whatever and don't resign. I would rather you disconnect. Far less time being wasted. You don't resign when you're in a completely lost (and I do mean completely) position then you're just saying you don't have any respect for your opponent.
I'll be the first to admit I'm not the best sport. But I don't drag out lost games just to be a pr*ck.
End rant.
You have a right to resign when you want, and your opponent can't force you into doing that. Even if they completely losing, there are ways of making the draw by stalemating.

@TheImposter almost all of your rant is unrelated to anything occurring here. If you can't convert a victory your opponent should not resign.

If my opponent has counterplay and doesn't resign, I can get that. By "counterplay" I mean stuff like "3 passed pawns for a piece" or "Maybe they have an attack".
But if you somehow dropped a piece on move 4 and then followed it up by losing 5 pawns for nothing by move 20 I think it might be time to resign.

@TheImposter exactly, if you're not paying full attention, just making quick moves, especially at your level, mistakes are inevitable. This is why no one should ever resign to you.
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Unless there is a significant reward at the end, you gain nothing by working on a win where there is NOTHING to gain from it.
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The training of it is training, no reward is at the end. So, why not turn them into a sparring partner? If you really want to expend mental activity in the game then do that.
To win a game where you are the Hulk and the wimp is the wimp, it proves nothing. All it does is feed your ego. Big deal, you beat up a weakling. You feel real good about yourself?
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Whinge, whinge, whinge. If you are a Rook and a Queen up you can afford to sacrifice to finish off your opponent. If you were playing with that much extra material in a Cairo cafe people would hold their noses behind your back.