I hate to say it, but they did it to themselves in some ways. Poor updates from HTC for phones, non support for some older flagship phones (/cough Thunderbolt). They all look the same which to me sucks. HTC Sense UI sucks. Beats audio was a sham. It was just a software EQ though the headphones were decent. Plus they put out WAY too many phones.
We can't blame them for not updating the Thunderbolt to ICS- They packaged it and passed it off to Verizon. Verizon has just seemingly squashed the whole thing, I guess in hopes of getting us schmucks with Thunderbolts to sign new contracts and to get new phones. They are to blame for this terrible phone. They should have pulled the Thunderbolt and released the Rezound as it when they clearly were behind the curve at the time in phones and the phone had a boat load of issues. IMO, with a year left on our contracts, VZ and/or HTC should have offered us Rezounds or Inc LTE's as a consolation for putting up with this piece of crap phone and being guinea pigs for VZ's LTE launch.
Beats was a stupid investment. Even stupider was pulling away from it. Getting Beats headsets with your phone separated HTC from the pack, but they stopped packing them altogether. Now you get Beats software integrated with your phones. Great, I get a more bassy sound.
And Sense has not kept up with the others. It's slow, laggy, an dorky looking now. Samsung and Moto have breezed past HTC with their UI improvements and innovations. The Galaxy SIII is looking like a game changer. Not only is it still the best phone out there, it is available on every carrier and looks exactly the same everywhere you go. With this strategy and a terrific marketing campaign Samsung built themselves a brand, which HTC did the old fashioned route with the One X, giving exclusivity AT&T and putting out a cracked out verison of the One X on Sprint (rebranded as the "HTC EVO 4G LTE", what a terrible name- confusing since there was already an "HTC EVO 4G." The average consumer, I'd venture to guess, would suspect that the two ere the same phone. How they let Sprint talk them into that one I'll never understand). Add in the Note and now the Note II, why would anyone want an HTC device? Also, their marketing is terrible. Has anyone ever seen an ad for the One X or the EVO 4G LTE? I haven't.
The Nexus rumors make a ton of sense (no pun intended). HTC gets a chance to break away from their Sense UI, trusting Google to polish their OS, and they also get to build a semi-phablet phone to compete with the Note II. As much as I hate my Thunderbolt and would never get another HTC device again, I hope HTC turns it around and has better luck going forward. They were a huge part during Android's early years, making the first Android phone (the HTC G1), the first Nexus, and breaking the barrier for phone size when they released the EVO 4G. I just hope they don't get bought out by Microsoft or something, and we have to say good-bye to HTC forever..