This is my sentiment too. 
I held SMT for a few years, I got out of it a few months ago with very small profits and put everything in to CSP1 (S&P500).
I believe SMT can easily outperform the S&P500, but for me it was just too stressful watching the price yo-yo.
Then there was their questionable decisions to hold Tesla at #1 spot even though it had been bleeding costantly, then Moderna even though COVID was over and that was bleeding and now they have SpaceX as top holding.
I currently hold 75% CSP1 and 25% SP20, double dipping the top 20 S&P500 for a bit more exposure to those companies. It’s worked out well so far with regular investments, CSP1 returning 15% and SP20 20%.
I’ve also dumped SMT. Made some good money on it over the years. And I actually like today’s portfolio more than at any time over the past four-five years. The managers have rationalised things and rooted out some of the junk.
But, like @phixion, I’ve moved money into the S&P for an easier life at a fraction of the cost.
Latest FT article on Baillie Gifford:
A bit of topic, it seems that Baillie Gifford (SMT) isn’t the only British star fund in trouble, Terry Smith’s Fundsmith is also lagging in the last 5 years.
The USD losing value also doesn’t help the European investors.
Providing access to private listed companies is a plus for BG