Regardless of what your opponent does, do your thing when you're at and away from the table. If your opponent is a great player, it may be worth watching, thinking along, learn something about how the equipment's reacting etc. If not, watch some other table, do or think of something else.
And stop whining, as well as expecting others to solve your problems! You're competing, in other words, you're a warrior, not a wimp! Remember, time, nor your impatience, has got nothing to do with how fast or slow your opponent is. If he runs a quick hundred in Straight Pool, you're nonetheless sitting for half an hour or more. A minute is a minute, regardless of what's happening. All that counts is what you are doing (ultimately: to yourself) during that minute, half hour, whatever. If you're getting worked up because of what someone else is doing, you're effectively turning their problem into yours. You're a much better player if you learn to conserve your energy, channel and put it where it belongs.
Be economical: solve your problems, let the others solve theirs. By the same token, don't sit there hoping for your opponent to solve your problems. Wait for your turn, then do your thing - ideally, of course, keeping your opponent in the chair. But don't adapt or change your ways to achieve this - you're not there to please or displease others, nor lecture, patronize or bully anyone. Don't give in to his way of doing things. Do your thing - do it for yourself. Enjoy being you!
(Edit: as to intimidation, don't even think about "shooting slower than your opponent" - intimidation only works on opponents of lesser skill and mental strength, in other words, someone you'll beat anyhow provided you don't waste your energy. If your opponent is slow as well as a great player, what makes you think you could intimidate him being childish, as well as, perhaps, falling into his trap? Better to run out and keep him in the chair. One of my favourite pool saying's by the great Irving Crane: "The guy in the chair can't hurt you." That's true regardless of how good a player he is, how fast or slow he is, how intimidating he may be…)
Greetings from Switzerland, David.
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„J'ai gâché vingt ans de mes plus belles années au billard. Si c'était à refaire, je recommencerais.“ – Roger Conti