Since from day one have used TA, I view it this way.....using a tightrope between two buildings and safety net, you start practicing and for next 1,000 attempts to walk it you fall, on the 1,001 you get all the way across, and you continue to practice, half times fall and other times make it, till 99% of the time you walk across it becomes like walking on a floor.
In the beginning all say it can't be done and tightrope walking is useless whether using thin rope or thicker, it just is useless, but through experience, yours and not those of who have given up, you eventually conquer the ability to do so.
Through my development of systems, I have found TA works in all timeframes, but if you expect to see one thing in 2 minute charts and then think it be in five minute, it often won't be there cause shorter timeframe shows quicker price. But works going to smaller timeframe as you can often see divergences from longer to shorter. TA is exactly like price is a delayed version of price though. As far as long term vs short term, the use of filters or rules must be more or less than using larger timeframes depending on what you aiming to recover through profits. You can't expect using same rules for both intraday and monthly charts, intraday will produce many signals of profit/loss whereas monthly much fewer cause of time. In order to build a 5% losing system whether in long term or intraday, you need more delaying indicators which will slow down signals to form, you concentrate on not having losses and not highest profits. Intraday actually has higher risks than long term and has lower rewards for me, most don't see it this way. In order to have very small losing %, you have to have larger stops, size of congestive waves, whereas if you study how to hedge longer term trades, your stops can be much lower than your trades on intraday. Also, targeting 5% losses does not mean 95% profits as one can have 50% breakevens and 45% targets are hit profitable trades.
But bottom line as far as TA working better or worse, learn to skip across the tightrope or in other words your knowledge expands more than your opponents.